GBC GBC4250 User manual

Operating Instructions
General Binding Corporation
Northbrook, IL 60062^195

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TABLE OF CONTENTS
SECTION ease
• IMPORTANT SAFETY INSTRUCTIONS 3
• IMPORTANT SAFEGUARDS 3
-GENERAL 3
-ELECTRICAL 4
-SERVICE 5
-SET-UP 5
• SPECIFICATIONS 6
• KNOW YOUR GBC4250 LAMINATOR 6
• FILM LOADING & THREADING 8
-METHOD USING FILM THREADING CARD 10
-METHOD FOR TACKING NEW FILM TO PRE-EXISTING FILM 13
. FILM ALIGNMENT PROCEDURE 15
• FEED TABLE REMOVAL 15
• OPERATING PROCEDURE 15
• SPEED GUIDE AND THE ART OF LAMINATION 17
• FILM TENSION AND ADJUSTMENT 19
• CARING FOR THE GBC4250 LAMINATOR 20
• TROUBLE SHOOTING GUIDE 22
CLEARING A FILM JAM
23

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IMPORTANT SAFETY INSTRUCTIONS
YOUR SAFETY AS WELL AS THE SAFETY OF OTHERS IS IMPORTANT
TO
IMPORTANT
CAREFULLY.
IN THIS INSTRUCTION AND ON THE PRODUCT ARE
SAFETY MESSAGES. READ THESE MESSAGES
^^THIS, THE SAFETY ALERT SYMBOL, PRECEDES EACH SAFETY
MESSAGE IN THIS INSTRUCTION MANUAL. THE SYMBOL INDICATES
A POTENTIAL PERSONAL SAFETY HAZARD THAT COULD HURT YOU
OR OTHERS, AS WELL AS CAUSE PRODUCT OR PROPERTY
DAMAGE.
Awarning ^ DO NOT ATTEMPT TO SERVICE OR
REPAIR THE GBC4250 LAMINATOR OTHER THAN AS INSTRUCTED IN
THESE OPERATING INSTRUCTIONS.
Awarning DO NOT CONNECT THE GBC4250 LAMINATOR
TO AN ELECTRICAL SUPPLY OR ATTEMPT TO OPERATE THE
LAMINATOR UNTIL YOU HAVE COMPLETELY READ THESE
INSTRUCTIONS. MAINTAIN THESE INSTRUCTIONS IN A CONVENIENT
LOCATION FOR FUTURE REFERENCE.
Awarning TO GUARD AGAINST INJURY, THE FOLLOWING
SAFETY PRECAUTIONS MUST BE OBSERVED IN THE INSTALLATION
AND USE OF THE LAMINATOR.
A IMPORTANT SAFEGUARDS
GENERAL
Keep hands, long hair, loose clothing and articles, such as necklaces or ties,
away from the front (heat) and rear (pull) rollers to avoid entanglement and
entrapment.

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The heat rollers can operate at temperatures close to 300 °F. Avoid contact
with the heat rollers during operation or shortly after power has been
removed from the laminator.
Keep hands and fingers away from the path of the sharp film cutter blade
located at the area of film exit.
Do not use the laminator for other than its intended purpose.
Do not place the laminator on an unstable cart, stand, or table. An unstable
surface may cause the laminator to fall resulting in serious bodily injury.
Avoid quick stops, excessive force, and uneven floor surfaces when moving
the laminator on a cart or stand.
Do not defeat or remove electrical and mechanical safety equipment such as
interlocks, shields and guards.
Do not insert objects unsuitable for lamination or expose the equipment to
liquids.
ELECTRICAL
The laminator should be connected only to a source of power as indicated in
these instructions and on the serial plate located on the rear of the laminator.
Contact an electrician should the attachment plug provided with the
laminator not match the receptacles at your location.
Disconnect the attachment plug from the receptacle to which it is connected
and maintain the power supply cord in your possession while moving the
laminator.
Disconnect the attachment plug from the receptacle when the laminator is
not used for extended periods of time.
Do not operate the laminator with a damaged power supply cord or
attachment plug, upon occurrence of a malfunction, or after the laminator
has been damaged. Contact GBC’s Technical Service Department or your
dealer/distributor for assistance.
Observe the marked electrical rating on the equipment to avoid overloading
the branch circuit (receptacle) to which the laminator is connected.
Disconnect the attachment plug from the receptacle and maintain the power
supply cord in your possession when replacing the line fuse. The fuse holder

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is located on the rear of the equipment. Replace fuse only with type
specified on fuse rating label located near fuse holder.
SERVICE
Perform only the routine maintenance referred to in these instructions. Do
not attempt to service or repair the laminator. Contact GBC’s Technical
Service department or your dealer/distributor for service or repair.
Disconnect the attachment plug from the receptacle and contact GBC’s
Technical Service Department or your dealer/distributor when one or more of
the following has occurred:
-The power supply cord or attachment plug is damaged.
-Liquid has been spilled into the laminator.
-The laminator is malfunctioning after being mishandled.
-The laminator does not operate as described in these instructions.
SET-UP
1. Shipping damage should be brought to the immediate attention of
the delivering carrier.
2. Place the GBC4250 laminator on a stable flat surface capable of
supporting at least 85 lb. (39 Kg). The surface should be at least 30 inches
high to assure comfortable positioning during operation. All four rubber
support feet of the laminator shall be positioned completely on the
supporting surface. This supporting surface may also be large enough to
place the material which is to be laminated.
3. The laminator should be located to allow exiting film to drop freely to the
floor. Accumulation of laminate immediately behind the laminator as it exits
the equipment may cause the film to wrap around the rear pull rollers,
resulting in a “jammed” condition.
4. Avoid locating the laminator near sources of heat or cold. Avoid locating
the laminator in the direct path of forced heated or cooled air.
5. Connect the attachment plug provided with the laminator to a suitable
grounded outlet only. Avoid connecting other equipment to the same
branch circuit to which the laminator is connected because this may
result in nuisance tripping of circuit breakers and blown fuses.

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SPECIFICATIONS
Operating Speed-1.5 fpm (45.6 cm) to 10 fpm (3 m)
Dimensions- 32.5 in. (83 cm) wide x 21 in. (53 cm) long x 12 (31 cm) in. high
Weight- 85 lb. (39 kg)
Electrical Requirements- Refer to the Serial Plate located on the rear of the
laminator for the specific electrical rating applicable to the provided
equipment.
Voltage 115V~. 60Hz
Current 12 A
Power 1450 W
KNOW YOUR GBC4250 LAMINATOR
A. P OWER SWITCH: Use
to apply power to the
laminator. The green
power “ON” lamp, located
adjacent to the power
switch, will illuminate when
the power switch is set at
the "On” position, marked
I, Set the power switch at
the "Standby” position,
marked
laminator off.
B. R UN/STOP SWITCH:
“Stop” position removes power from the Pull Roller drive motor. Moving the
switch to the “Run” position applies power to the drive motor.
C. SPEED CONTROL: Use to control the speed of lamination. The speed is
adjustable from the “Slow” setting of 1.5 fpm (0.46 m) to a “Fast” setting of
10 fpm (3 m).
D. “READY” LAMP: Continuously illuminates when the heat rollers are
sufficiently hot for the selected speed setting.
(!),
to turn the
CONTROL PANEL
POWER SMrrCK
RUN/STOP SMTCH
•READV LAMP

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E. “ WAIT” LAMP: Flashes when the temperature of the heat rollers is
insufficient for the selected speed setting. The occurrence of a flashing wait
light will be signified by an audible alarm (beep).
F. FEED (SUPPORT) TABLE:
The Feed Table is used to
position items for lamination.
The laminator will operate
only with the Feed Table and
Feed Table Latch properly
installed.
G. SAFETY SHIELD: Prevents
entanglement, entrapment and
inadvertent contact with the
heat rollers. The laminator will
operate only when the Safety
Shield is located in the full down position. Power to the laminator is
removed when the Safety Shield Is lifted.
H. TABLE INTERLOCK LATCH- Used to lock Feed Table into position and
activate an interlock. The interlock latch is located at the left underside of the
feed table. The table cannot be removed without retracting the latch to the
right while lifting the table upwards and away from the laminator. The
laminator will not operate when the feed table is removed and/or the
Interlock latch is retracted.
I. FEED GUIDE- The Feed Guide permits aligning the item(s) to be
laminated. Reposition the adjustable feed guide by loosening the knob on
top of the guide. Slide the Feed Guide to the desired position and tighten the
knob to secure the Feed Guide in place. The Feed Guide is used to keep
longer items straight. The Feed Guide may also be used to feed small items
side by side by positioning the feed guide towards the center of the feed
table and placing the smaller items against each side of the Feed Guide as
they are being introduced into the nip point of the heat rollers.
J. HEAT ROLLERS- Silicone rubber coated aluminum tubes. Used to heat
the laminating film and compress the heated film to the items being
laminated. Heat is provided by an internal heating element. The Safety
Shield causes the rollers to separate for loading new film or close once the
laminating film is loaded.
K. IDLER BAR-One provided for each film supply roll. Used to direct the film
to the Heat Rollers. Bottom Idler Bar is removable to ease film loading.
FIGURE 2

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L. P ULL ROLLERS- The set of rollers located at the back of the laminator.
These rollers are motor driven. They are used to simultaneously pull the
laminate and improve the quality of the laminated item.
M. FILM
CUTTER: Use
to cut the film
web at the area
at which the web
exits the
laminator.
N. REVERSE
SWITCH: Used
to facilitate
removing a
jammed (wrap-
up) condition.
The pull rollers
are caused to
rotate in the
reverse direction. The laminating film is pulled back into the laminator when
the Reverse Switch is depressed.
O. LINE FUSE- Located in the fuse holder which is positioned on the rear of
the equipment.
P. CORE CLIPS- Mounted on the Supply Roll Shaft. Used to hold the film roll
to the supply roll shaft.
Q. FILM WEB- Laminating film loaded into the equipment.
R. NIP POINT- The point at which the top and bottom rollers contact. The
Nip Point of the heat rollers is the place at which items for lamination are
introduced into the laminator.
FILM LOADING & THREADING
Refer to figure 4 or the film threading diagram located beneath the feed table
on the inner side panel of the laminator for illustration of properly loaded film.

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THREADING DIAGRAM
LAMINATOR SIDE VIEW
The top and bottom rolls of laminating film must be of the same width and
must be present simultaneously. A small amount of adhesive will "squeeze
out” during lamination. Hardened adhesive deposited on the rollers may
damage the heat rollers. Rotate the rollers at the "Slow” speed setting only to
avoid damaging the rollers, when the laminator has not achieved full
operating temperature as indicated by a flashing Wait lamp. Refer to the sec¬
tion entitled CARING FOR THE GBC425Q LAMINATOR for instructions
regarding removal of the accumulated adhesive.

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Adhesive will deposit on the heat rollers if either only one roll of film is used,
different widths of film are used simultaneously, or either roll is loaded with
the adhesive side contacting the heat rollers. Refer to the section entitled
CARING FOR THE GBC425Q LAMINATOR for instructions regarding
removal of accumulated adhesive.
FIGURE 5
The adhesive side of the film is on the inner surface of the web (see figure
5). The shiny side of clear film must contact the heat rollers. The dull side of
clear film contains the adhesive. Use extreme caution when loading
delustered (matte) film because both sides appear dull.
Always change the top and bottom supply rolls at the same time. Near the
end of each roll of GBC laminating film is a label stating "Warning-End of
Roll.” The appearance of this label on either the top or bottom roll requires
that new rolls of laminating film be installed as soon as the item presently
being laminated completely exits the rear of the laminator. Do not introduce
any additional items into the laminator when the warning label appears on
either the top or bottom roll.
Method Using Film Threading Card
The following procedure uses the film threading card provided with new rolls
of GBC film. The laminator should be cooled to touch before proceeding.
1. Set the ON/STANDBY switch in the Standby Ci) position. Remove feed
table.
2. Cut remaining top and bottom film webs between supply rolls and heat
rollers. Be careful not to cut the heat rollers.
3. R aise shield to upright position.

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4. D o not allow remaining film to pass through the laminator if there is any
exposed liquefied or tacky adhesive. Liquefied or tacky adhesive will
deposit on heat rolls if the following procedure is not observed.
Reinstall the feed table. Place overlapping sheets of clean, white paper
across the full width of the feed table. Lower the shield. Position the
ON/STANDBY switch in the “On”, denoted I. position. Set the Speed
Control at “Slow”. Position the RUN/STOP switch at the “Run” position.
Slide all sheets of paper into the heat rollers’ nip point until they are
grasped by the laminate and passed completely through the laminator with
the remaining film. Be certain that there is no exposed adhesive
contacting the rollers and that the paper and film completely exit the
laminator.
5. S et the ON/STANDBY switch in the “Standby”
O position.
6. L ift shield to full upright position.
7. Remove feed table and bottom
film guide (see figure 6).
8. Remove bottom supply roll from
laminator and remove film roll
core from supply roll shaft.
Observe that both core clips are
still located on the supply roll
shaft. Check removed core if
either core clip is missing.
9. Slide new film roll on supply roll
shaft. Compare film roll orientation
of newly installed roll with threading diagram or threading label located on
laminator.
10. Replace bottom supply roll. Newly installed roll must unroll in same
direction as shown on threading diagram or threading label located on
laminator.
11. Unroll 2 ft. (61 cm) of film. Pull film upward past heat rollers and drape
over top Idler Bar.
12. R eplace bottom film guide.

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13. Remove top supply roll from laminator and remove film roll core from
supply roll shaft. Observe that both core clips are still located on the supply
roll shaft. Check removed core if either core clip is missing.
14. Slide new film roll on supply roll shaft. Compare film roll orientation of
newly installed roll with threading diagram (figure 4) or threading label
located on laminator.
15. Replace top supply roll. Newly installed roll must unroll in same direction
as shown on threading diagram or threading label located on laminator.
16. Unroll 2 ft. (61 cm) of
FILM
GUIDE guide covered with film from
step 11 (see figure 7).
17. Place threading card
against film at nip point of
upper and lower heat
rollers. Push threading card
into the nip point of the heat
rollers. Continue pushing
the threading card until the
leading edge of the card
contacts the nip point of the
FIGURE 7
pull rollers (see figure 8).
18. L ower the shield to full down position.
19. I nstall feed table. Verify Feed Table Latch has penetrated side plate.
Threading card shall be resting on top surface of feed table.
20. Position motor speed
control at slowest setting.
Position ON/STANDBY
switch to “On” I setting.
Position motor
RUN/STOP switch to
“Run” setting.
21. Watch leading edge
of threading card to
assure that it engages nip
point of top and bottom
FIGURE 8

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pull rollers and is advancing through the laminator. Speed may be increased
to expedite operation. Set motor RUN/STOP switch to “Stop” once threading
card has completely exited laminator.
22. Check film alignment. See section entitled Film Alignment Proce dure for
instructions if installed film needs alignment.
Acaution THE FOLLOWING PROCEDURE IS PERFORMED
WHILE THE LAMINATOR IS HOT. USE EXTREME CAUTION. AVOID
CONTACT WITH THE HEAT ROLLERS.
Method For Tacking New Film to Pre-existing Film
The following describes a method for loading film whereby the pre-existing
film present on the heat rollers may be used in place of the threading card to
draw the new film through the laminator. The adhesive of the pre-existing
film must be tacky or liquefied. Leading edges of the new film will be
overlapped onto pre-existing film. The tacky adhesive of the old film will
adhere to the leading edges of the new film. The pre-existing film and the
new film will be simultaneously drawn through the laminator.
1. Position the ON/STANDBY switch to the “Standby” setting. Remove feed
table.
2. Cut remaining top and bottom film webs between supply rolls and heat
rollers.
3. Raise shield to full upright position.
4. Do not allow adhesive side of pre-existing film to contact heat or pull
rollers. Liquefied or tacky adhesive deposited on heat or pull rollers will
require the rollers to be cleaned per the section entitled Caring for the
GBC4250 Laminator .
5. Remove feed table and bottom film guide (see figure 6).
6. Remove bottom supply roll from laminator and remove film roll core from
supply roll shaft. Observe that both core clips are still located on the supply
roll shaft. Check removed core if either core clip is missing.
7. Slide new film roll onto supply roll shaft. Compare film roll orientation of
newly installed roll with threading diagram (figure 4) or threading label
located on laminator.

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8. P lace the roll of film on a clean stable surface in front of the laminator. The
roll of film must be positioned to unroll in same direction as shown on
threading diagram (figure 4) or threading label located on laminator.
9. Unroll enough film to
contact and completely
cover the pre-existing
film laying on the
bottom heat roller. Lay
the leading edge of film
on the tacky edge of
the pre-existing film
(see figure 9).
10. Replace bottom
film guide.
11. Install the bottom
supply roll.
12. Remove top supply roll from laminator and remove film roll core from
supply roll shaft. Observe that both core clips are still located on the supply
roll shaft. Check removed core if either core clip is missing.
13. Slide new film roll onto supply roll shaft. Compare film roll orientation of
newly installed roll with threading diagram (figure 4) or threading label
located on laminator.
14. Replace top supply roll. Newly installed roll must unroll in same direction
as shown on threading diagram (figure 4) or threading label located on
laminator.
15. Unroll enough film to contact and completely cover the pre-existing film
laying on the top heat roller. Lay the leading edge of film on the tacky edge
of the pre-existing film.
16. Lower the shield to full down position. Install feed table.
17. Set motor speed control at slowest setting. Position ON/STANDBY
switch to “On” I setting. Set motor RUN/STOP switch to “Run” setting.
18. Observe the film as it is pulled through the laminator to assure that the
remaining pre-existing film and the new film are advancing concurrently. Any

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separation between the pre-existing and newly installed film requires that the
motor be immediately stopped and the situation corrected to assure that the
pre-existing and new films are passed through concurrently.
19. Set the motor RUN/STOP switch to the "Stop” position once the installed
film is completely exiting the laminator.
20. Check film alignment. See section entitled Film Alignment Proceduj:e for
instructions if installed film needs alignment.
FILM ALIGNMENT PROCEDURE
Review alignment of left and right edges of the top and bottom film rolls. Set
the ON/STANDBY switch to the “Standby” 0 position if re-alignment is
necessary. Adjust alignment by repositioning the metal disc on either film
supply roll shaft. Use the alien wrench (3/32 in.) supplied with the laminator
to loosen the set screw of either metal disk. Slide the disc and the film roll
along the shaft until they are aligned with the film roll on the other shaft. Lock
the disc into position by tightening the loosened set screw with the alien
wrench.
FEED TABLE REMOVAL
Refer to figure 2 and the following procedure to remove the feed table:
1. Lift the shield to its upright position.
2. Slide the Feed Table Latch to the right.
3. Lift the table upwards and away from the laminator.
OPERATING PROCEDURE
The speed setting may be positioned at the “Fast” setting when the laminator
will be used within a short period of time. To conserve energy, the speed
setting may be positioned at “Slow” when it is expected the laminator will not
be used for longer periods of time. It is recommended the ON/STANDBY
switch be set at the Standby Ci) when not operated for long periods of time.
1. Lower the Safety Shield to its full down position.
2. Check that the Feed Table latch is penetrating the left hand side plate.

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3. Place the motor RUN/STOP switch in the “Stop” position.
4. Position the Speed Control to the desired setting. Set the control to the
"Fast” setting for faster warm-up.
5. Set the ON/STANDBY switch to “On” I.
6. Do not begin laminating until the “Wait” light stops flashing and the
“Ready” light has illuminated. The normal warm-up time, signified by the
Ready lamp illuminating, is approximately 17 minutes with the Speed Control
positioned at the “Fast" setting.
7. Reposition the Speed Control at the desired setting if initially adjusted to
“Fast" to minimize warm-up time. Adjusting the Speed Control to a higher
setting during lamination may cause the Wait lamp to illuminate and flash.
Either reposition the Speed Control to a slower setting or discontinue
laminating, both until the Ready lamp illuminates, should the Wait lamp flash
while laminating
8. Position the item(s) to be laminated on the Feed Table.
9. Position the RUN/STOP switch to “Run”. The rear pull rollers will rotate.
The heat rollers will not rotate unless film has been loaded into the
laminator.
10. Push the item(s) to be laminated into nip point of the heat rollers. The
item(s) will be grasped by the heat rollers and drawn into the laminator.
Additional items may be laminated without stopping and restarting the
equipment.
11. Should a jam occur, stop the laminator by moving the RUN/STOP switch
to the “Stop" position. Refer to the section entitled Clearing a Film Jam
(wrap-up) for specific instructions.
12. Stop the laminator once all laminated items completely exit the rear of
the laminator.
Acaution
Do not reach over the laminator to operate
the film cutter.
13. T he Film Cutter may be used to separate the laminated items from the
film web. Position the cutter at either side of the laminator, depress the
cutter’s handle while sliding the cutter across the film web.

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14. Allow the laminator to remain powered if it is anticipated that the
laminator will be used within a short period of time. It is recommended that
the ON/STANDBY switch be positioned at “Standby” when the laminator
will not be used for longer periods. The Safety Shield may be left in an
upright position when the laminator will remain unused for an extended
period. Placing the shield upright will prevent developing a flat spot on the
heat rollers.
The attachment plug may be disconnected from the receptacle when the
laminator will not be used for long periods of time.
SPEED GUIDE AND THE ART OF LAMINATION
Do not attempt to laminate abrasive materials or metal objects such as
staples, paper clips, and glitter because the heat or pull rollers may be
damaged.
Do not force items into the nip point of the heat rollers. An item that is
not easily drawn into the laminator by the heat rollers is probably too
thick to laminate.
Wrinkles may result if an attempt is made to reposition an item once it
has been grasped by the heat roiiers.
Do not stop the laminator before an item has completely exited. Even a
momentary stop will cause a mark on the laminated item.
Good, consistent lamination is a result of combining proper temperature with
dwell time (time that the material to be laminated is compressed between the
heat rollers). Dwell time is adjusted via the SPEED CONTROL. When the
SPEED CONTROL is adjusted the laminator automatically sets the
appropriate operating temperature.
As a general rule, thicker items and thicker film need to be run at slower
speeds because they cause more heat to be extracted from the heat rollers.
Setting the SPEED CONTROL at slower settings causes the temperature of
the heat rollers to be higher and the dwell time to be longer, thus allowing
proper lamination of thick items. Thinner items, such as standard copier
paper and tissue paper extract less heat from the rollers and may be
laminated at faster speeds.
The Wait lamp may illuminate and flash if the SPEED CONTROL is set too
fast for the material and film being laminated. Either reposition the SPEED

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CONTROL to a slower setting or move the RUN/STOP switch to the “Stop
position until the Ready lamp illuminates.
More thorough heating of the heat rollers is achieved by allowing the motor
to remain off for longer periods of time. Operation of the laminator in the
Standby mode for thirty or more minutes may necessitate positioning the
SPEED CONTROL at or near the medium speed setting. For example,
satisfactory lamination quality is achieved using a single glossy poster
laminated at slow speed immediately after the Ready lamp has illuminated at
initial warm-up. The same poster’s ink may fade if immediately laminated
after the laminator were operated in the “idle” mode (power on, motor off) for
thirty or more minutes. Acceptable lamination can be achieved by increasing
the SPEED CONTROL setting which decreases the dwell time.
Operating the laminator in the “idle” mode (power on, motor off) for longer
periods of time facilitates continuous lamination of thick items. If several thick
items are to be laminated, it is recommended that the laminator remain in
“idle” mode for thirty minutes to attain maximum operating temperatures.
A simple method of checking whether or not the equipment is sufficiently
heated to laminate a particular material is to laminate test (scrap) material of
the same or similar type prior to feeding the material to be laminated. This
procedure is also recommended because rotating the heat rollers prior to
lamination will more evenly distribute the heat.
The following chart provides general guidelines for proper settings to use for
certain materials and laminating film combinations. This chart is only a
general guide. Different settings may be suitable as the warm up time,
lamination time and materials change.
Film
1.5 Mil
3 Mil
Material
(.0015”)
(.0030”)
Newspaper
20 lb. Copier Paper
Magazine Stock
Tissue Stock
Fast
Slow-Medium*
Construction Paper
Posters
Medium
Slow
Index Cards
File Folders
Poster Board
Slow
Slow

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*Slow-Medium indicates a SPEED CONTROL setting approximately midway
between “slow” and “medium”.
FILM TENSION ADJUSTMENT
Proper tension is the minimum amount required to eliminate wrinkles in the
finished laminated item. The film tension is set at the factory. Periodic
adjustment should not be necessary unless other than 1.5 mil GBC film is
used or the lamination is exhibiting unsatisfactory. Film tension may be
checked periodically to assure that adjustment is not required.
The film should be taut. An adjusted roll of film should not require excessive
force to turn by hand. Film tension should be enough to introduce a minor
amount of drag as the film unrolls. Under- or over-tightening will introduce
wrinkles or incomplete adhesion on laminated items.
Too little tension causes wrinkles in the finished laminated item. Too much
tension causes film to stretch. The top and bottom rolls should be adjusted to
exhibit equivalent tension.
Uneven tension between the top and bottom rolls can cause the laminated
product to curl. Upward curl indicates greater tension on the top roll.
Downward curl indicates greater tension on the bottom roll. Over-tightening
may cause slippage of motor clutch.
1. U nroll 2 ft. of film on the bottom roll of film.
2. Insert the alien (hex-head)
wrench provided with the
laminator into adjustment
hole as shown in figure 10.
3. Rotate film roll until
wrench engages internal
brake mechanism. While
holding the alien wrench in
place, rotate film roll in
direction of arrow of figure
10 to increase tension.
4. Remove alien wrench.
5. C heck brake tension setting by rotating the film in the direction of normal
rotation. Resistance to rotation should be slight, not forced.

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6. Insert the alien wrench
provided with the laminator
into adjustment hole of the
top film roll (see figure 11).
7. Rotate film roll until
wrench engages internal
brake mechanism. While
holding the alien wrench in
place, rotate film roll in
direction of arrow of figure 11
to increase tension.
8. Check brake tension
setting by rotating the film in the direction of normal rotation. Resistance to
rotation should be slight, not forced.
9. L aminate some test samples to check film tension. Readjust as
necessary.
CARING FOR THE GBC4250 LAMINATOR
GBC offers a Cleaning Kit as well as Extended Maintenance Agreements.
Contact your GBC Service Representative or your dealer/distributor for
additional information.
The only maintenance required is to periodically clean the heat rollers. The
following procedure will help to keep the heat rollers free of adhesive that
has been deposited along the edge of the laminating film. Proper alignment
of the top and bottom rolls of laminating film will minimize the amount of
adhesive deposited.
Acaution THE FOLLOWING PROCEDURE IS PERFORMED
WHILE THE LAMINATOR IS HOT. USE EXTREME CAUTION.
-Never clean rollers with sharp or pointed objects.
-Do not apply any cleaning fluids or solvents to the rollers.
-Hardened adhesive deposited on the rollers may cause damage. Rotate the
rollers at the “Slow” speed setting only to avoid damaging the rollers.