U.S. BLIND STITCH 718-1 User manual

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UNITY SEY/rn "'^PLY CO.
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Los Anfeei^i-
U.S. BLIND STITCH MACHINE CORR
Express Street & Skyline Drive, Plainview, New York 11803
Telephone: 516-a33-4350
Cable: "BLINSTIT PLAINVIEW NEWYORK"
ARTS CATALOG
and MAINTENANCE
MANUAL for MACHINE
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HOW^CrORDER PARTS
PURCHASE ORDER
QUANTITY
DESCRIPTION
PRICE
1
12
FOR U.S. MODEL 718-1 - SERIAL NOJ xxxxx
Part No. 2100 Feed Dog
Part No. 1238 Needle Guide
If parts are being ordered for several machines the
Purchase Order should be prepared in a similar
fashion to the following example:
1
12
FOR U.S. MODEL 718-1 - SERIAL NO. xxxxx
Part No. 2100 Feed Dog
Part No. 1238 Needle Guide
FOR U.S. MODEL 718-1 - SERIAL NO. yyyyy
Part No. 1046 Handwheel
Part No. 1119 Screws - Feed Dog Attaching
FOR U.S. MODEL 718-6 - SERIAL NO. zzzzz
Part No. 2112 Feed Dog
AMOUNT
Be SURE to Specify Model and Serial
number of machine when ordering parts!
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T/ie io^otvZng paAXj cataZogue, aon6'L6t6 oi a compZztz
o(U4.c catalogue plu^ tke pink paat^ ll^t 4heet which
mmedlatelif iollow^, thU note. CJhen looking loa a
paA^culaK
poAt, {lA^t consult the pink ^heet. IX the
x^!^' appe<u on thl6 6heet alongside the appAopAlate
^ectton, then tuAn to the coAAe^iponding section In the main
catalogue and Ae^eA to the paAt numbcA listed theAe.
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GROUP
PRESSERFOOT
USE
PART
NUMBER
1229 (2)
1230 (2)
6100
2300
2500
1242
1266 (1)
INSTEAD
OF
PART NUMBER
6101
2301
2503
5028
1283
718-9
(continued)
DESCRIPTION
Lockwasher-Front Plate to Bracket
Attaching Screw
Washer-Front Plate to Bracket Attaching
Screw
Presserfoot Assembly
Presserfoct
Shoe - Presserfoot
Holder Front Guide
Screw-Front Guide to Holder Attaching
Nut-Front Guide to Holder Attaching
Page 2 of 2 Pages
Date: October 1,1962
Revised Nov. 20, 1964
From the library of: Superior Sewing Machine & Supply LLC

PARTS LIST FOR U.S. BLIND STITCH MACHINE CORP.
718-9
This parts list is the same as the parts list for the basic model 718
With.-the following deletions and additions:
INSTEAD OF
PART NUMBER
USE PART
GROUP
NUMBER
MAIN FRAME
None
MAIN SHAFT
None
NEEDLE DRIVE
None
FEED DRIVE
None
LOOPER DRIVE
None
FEED FRAME I
6001
FEED FRAME II
None
REGULATING
None
FRONT PLATE
1320
1321
1371
1037
1318
1326
1327
(1)
(1)
(1)
(2)
(1)
1341 (2)
6008
1211
1101
1200
1225
1048
1226
1049
1228
5015
1051
1227
1052
1053
1051
Rib Shaft Assembly
Cylinder
Screw - Cylinder Attaching
Front Plate
Pivot Pin - Front Plate
Retaining Ring - Pivot Pin
Collar - Pivot Pin
Screw - Pivot Pin Collar Set
Bracket - Front Plate Supoort
Stop Pin Assembly
Screw - Stop Pin Lock
Stop Plate
Screw - Stop Plate Attaching
Wc'Sher - Stop Plate Attaching Screw
Screw-Pivot Pin Lock
Post - Front Plate
Screw - Front Plate Support Pin Lock
Pin - Front Plate Support
Screw-Front Plate to Bracket Attaching
Screw-Front Plate to Support Pin
Attaching
Nut-Front Plate to Bracket Attaching
Screw
Page 1 of 2 Pages
Date: October Ij 19B2
From the library of: Superior Sewing Machine & Supply LLC

PARTS LIST FOR U.S. BLIND STITCH MACHINE CORP.
718-9
This parts list is the same as the parts list for the basic model 718
vuth.the following deletions and additions:
GROUP
MAIN FRAME
MAIN SHAFT
USE PART
NUMBER
None
None
NEEDLE DRIVE None
FEED DRIVE None
LOOPER DRIVE None
FEED FRAME I 6001
FEED FRAME II None
REGULATING None
FRONT PLATE 1320
1321
1371 (1)
1037 (1)
1318 (1)
1328 (2)
1327 (1)
13m (2)
INSTEAD OF
PART NUMBER
6008
1211
1101
1200
1225
1048
1226
1049
1228
5018
1051
1227
1052
1053
1051
Rib Shaft Assembly
Cylinder
Screw - Cylinder Attaching
Front Plate
Pivot Pin - Front Plate
Retaining Ring - Pivot Pin
Collar - Pivot Pin
Screw - Pivot Pin Collar Set
Bracket - Front Plate Support
Stop Pin Assembly
Screw - Stop Pin Lock
Stop Plate
Screw - Stop Plate Attaching
Wcsher - StOD Plate Attaching Screw
Screw-Pivot Pin Lock
Post - Front Plate
Screw - Front Plate Support Pin Lock
Pin - Front Plate Support
Screw-Front Plate to Bracket Attaching
Screw-Front Plate to Support Pin
Attaching
Nut-Front Plate to Bracket Attaching
Screw
Page 1 of 2 Pages
Date: October 1, 1962
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From the library of: Superior Sewing Machine & Supply LLC

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III - MAINTENANCE INSTRUCTIONS
INTRODUCTION
• A. Replacing the Looper
B. Replacing the Needle Guide
C. Replacing the Shoe
D. Replacing the Feeder
From the library of: Superior Sewing Machine & Supply LLC

MAINTENANCE INSTRUCTIONS
INTRODUCTION
All U.S. BLIND STITCH machines are designed for long life and
trouble-free performance. When installed and lubricated in
accordance with the INSTALLATION AND OPERATING INSTRUCTIONS, only
the minimum maintenance normally associated with industrial sewing
machines will be required. These maintenance requirements will
generally be confined to the four locations described below, at
which wear may be expected after extended use. When such wear does
occur, the worn part may be readily replaced by following the
appropriate instructions. For ease of installation, and to insure
satisfactory service, it is essential that only genuine U.S. BLIND
STITCH parts and needles are used. They are the only parts designed
specifically for the machine, with the built-in long life and ex
cellent wearing characteristics typical of the U.S. BLIND STITCH
machine.
A. REPLACING THE LOOPER
1. Should it become necessary to replace the looper
(item "B" in Figure 6), loosen the looper clamp screw
(item "A" in Figure 6) and remove the old looper.
Because of the precise fit of the looper in the looper
rod it may be necessary to exert a moderate amount of {
force to pull the looper out. Insert the new looper
into the end of the rod as far as it will go before
bottoming on the looper shoulder. r
2. Any time a looper is moved or changed, recheck the looper
timing and reset if necessary. Proper looper timing is jJ
absolutely essential for correct stitch formation. As
described in detail below,, a properly timed looper will
pass over the needle in the correct position to pick up
the loop, and also clear the chain-off pin, feeder,
looper slot, and needle. The first check point for timing
the looper is at the position where the looper picks the ^
thread loop off the needle during the needle return stroke. u,
Referring to Figure 7, (Point "C"), the long prong of the
looper should pass over and just clear the scarf of the |
needle, approximately 3/32" (2.4mm) behind the end of the c.
needle eye. At the same time, the short prong of the
looper should pass over the needle with about 1/64
(.406mm) clearance, and must be so set that it also clears
the chain-off pin (item "D" in Figure 7).
• 'V>h' I
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3. To adjust the looper so that the timing checks out as
noted in paragraph 2, it may be rotated within its clamp
by a limited cimount. This adjustment should be made
with the looper clamp screw (item "A" in Figure 6)
loosened, and the looper bottomed against its shoulder.
Do not move the looper in or out, and do not attempt to
force the looper to turn beyond the limited amount of
travel available.
4. If the adjustment described in paragraph 3 is insufficient
to provide the correct timing, it will be necessary to
turn the looper rod (item "E" in Figure 6) itself. This
may be accomplished by loosening the two looper rod clamp
screws (item "C" in Figure 6) and the looper rod clamp
nut (item "D" in Figure 6). The rod is then free to
turn in the looper rod fork (item "F" in Figure 6). It
will normally be necessary to make only a very small
adjustment in order to get the looper into the correct
rotational position for proper timing. If, for any.
reason, the rod has been removed or the basic setting of
the looper rod has been disturbed by a large amount, it
may be reset by noting that the distance from the center
of the looper rod fork pin (item "G" in Figure 6) to
the rear face of the looper rod ball (item "H" in
Figure 6) is normally 4 & 3/32 inches (104mm) (refer to
Figure 6). If the rod is set to this dimension then only
minor adjustment will be required to bring the looper into
the correct timing position. Note that this dimension is
merely a guide to assist in setting a rod and variations
may be expected from machine to machine.
5. If, after completing the above adjustments, it is found
that the looper is either too low or too high, it will be
necessary to adjust the eccentric block. First loosen
the two set screws (item "A" in Figure 7). Place a wide
blade screwdriver in the slot of the eccentric block
(item "B" in Figure 7) and, using a slight turning motion,
raise or lower the looper as required. Once the proper
height is established, check" to see whether the looper
must be moved to the left or to the right prior to re-
tightening the eccentric block set screws. If such a
movement is required, it may be obtained by lightly
tapping the eccentric block in the correct direction with
the handle of a screwdriver.
From the library of: Superior Sewing Machine & Supply LLC

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FIGURE 6
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6. Once the looper is timed with respect to the needle as
outlined in paragraphs 2 thru 5 above, slowly turn the
handwheel in a direction away from the operator, until
the-looper approaches the edge of the looper slot
(Point "C" in Figure 8) in the presserfoot. At this
point make sure the small prong of the looper clears
this edge. If it does not clear, adjust the eccentric
block as outlined in paragraph 5 until the interference
is eliminated.
7. Continue turning the handwheel away from the operator
until the point of the needle starts to enter the area
in between the looper prongs. (Refer to Point "D" in
Figure 8). If the needle strikes the crotch of the
looper, the looper has generally been set too far for
ward. Check to see if the looper has been inserted into
the clamp as far as it will go. It should be inserted
until the shoulder on the looper is stopped on the clamp.
If this check is satisfactory, recheck the distance from
the center of the looper rod fork pin to the rear face
of the looper rod ball. Refer to paragraph 4 and reset
if necessary. If neither of the above two measures
corrects the problem, it is possible that the needle
lever may be set too low and requires adjustment.
8. Once clearance is established between the needle and the
looper crotch, continue turning the handwheel away from
the operator until the needle passes between the looper
prongs, clearing both the long and the short prong. If
difficulty is experienced at this point, it may be
necessary to modify some of the previous adjustments to
the eccentric block or the looper rod length. If this is
done, recheck the previous points to insure that a posi
tion is established which will satisfy all of the clear
ance conditions.
9. After all the necessary adjustments have been made,
tighten all set screws and the lock nut and recheck all
the adjustment points. Referring to Figure 9 the looper
should now clear the chain-off pin ("D"), feeder ("E"),
looper slot ("F"), needle, and pass over the needle in
the correct position to pick up the loop.
B. REPLACING THE NEEDLE GUIDE
1. After considerable service, it may be expected that the
wearing action of the needle will cause a sharp edged
groove to form on the needle guide (item "G" in Figure 9).
From the library of: Superior Sewing Machine & Supply LLC

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FIGURE 7
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This condition can cause thread breakage and uneven
penetration. When this happens the guide should be
replaced. The needle guide was specifically designed
as a readily replaceable wear plate to prevent damage
to the presserfoot from the action of the needle.
2o Loosen the needle guide attaching screw (item "A" in
Figure 9) and remove the worn needle guide. Clean
out any lint or dirt that may have accumulated under the
old guide and insert the new guide. Insure that the
new guide is seated flush with the top and side of the
presserfoot and then retighten the attaching screw.
Slowly turn the handwheel in the direction away from
the operator and check to insure that the new guide
fits properly under the needle and that no interference
has been introduced between the guide and the looper.
C. REPLACING THE SHOE
1. The shoe, (item "E" in Figure 8), also known as a cloth
retainer, normally will not require replacement.
However, in the event of wear due to the particular
fabrics being used, or if the shoe or spring suffers
any damage, they may be readily replaced.
2. The first step is to remove the complete front guide
assembly by unscrewing the front guide holder attaching
screw (item "A" in Figure 8). Next loosen the shoe pin
lock screw (item "B" in Figure 8) and slide out the shoe
pin (item "F"), shoe and retaining spring (item "G").
Before removing these components it is advisable to note
the manner in which the spring is assembled so that it
may be reinstalled in the same way.
3. When replacing an old shoe, make sure that the replacement
shoe properly fits the pin without binding and without
excessive looseness. In the event that the pin has worn
and does not fit the new shoe properly, it should be
replaced at the same time as the shoe. After replacing
the shoe, shoe pin and retaining spring retighten the shoe
pin lock screw and check to insure that the center of the
shoe is lined up with the center of the rib. Also insure
that the shoe clears both sides of the opening in the
presserfoot.
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FIGURE 8
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FIGURE 9
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D. REPLACING THE FEEDER
1.
In the event that the machine develops difficulty by
failing to properly feed the work, a worn feeder is
frequently found to be the cause. After considerable
service, especially with certain hard fabrics, the
feeder teeth have a tendency to become dull, and the
feeder should be replaced. In order to remove the old
feeder, remove the front feeder attaching screw (item "B"
in Figure 9) and loosen the rear feeder attaching screw
(item "C" in Figure 9). The old feeder may then be
slid out of place. Insert the new feeder under the
rear screw and replace the front screw.
2. Before tightening the attaching screws check to see
that the feeder is set to the proper depth. Referring
to Figure 10 this should be approximately 1/32" (.795mm)
below and parallel to the bottom of the presserfoot for
all light and medium weight fabrics. For heavy fabrics,
the setting should be approximately 1/16" (1.59mm) below
and parallel to the bottom of the presserfoot. These
dimensions are intended as guides and may be modified
as required by the specific fabrics. Once the proper
depth is established, rotate the handwheel slowly in a
direction away from the operator and check to insure
that the feeder clears the looper (see Figure 9, Point
and also clears both sides of the feeder slot in the
presserfoot. Firmly tighten feeder attaching screws
(Figure 9, Items "B" & "C") before resuming sewing.
H")
FIGURE 10
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PARTS CATALOGUE
INTRODUCTION
A. Main Frame Group
B. Main Shaft Group
C. Needle Drive Group
D. Feed Drive Group
E. Looper Drive Group
F. Feed Frame Group I
G. Feed Freime Group II
H. Regulating Group
I. Front Plate Group
J. Presserfoot Group
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INTRODUCTION
This Parts Catalogue has been designed as an integral part of
the U.S. BLIND STITCH MACHINE CORPORATION'S well known Spare
Parts Supply system. Parts and needle orders are normally
filled and shipped on the day they are received. A completely
stocked Spare Parts Department is maintained to insure the
immediate availability of parts and needles for all U.S. BLIND
STITCH machines. In order to facilitate the ordering of parts
and insure the accuracy of the order, this catalogue has been
arranged in an extremely simple and straight-forward fashion.
A unique feature of this new U.S. BLIND STITCH catalogue is the
availability of a specific catalogue for each of the many
different U.S. BLIND STITCH models. This automatically eliminates
the complicated searching among long lists of parts. It thus
greatly reduces the time required to select the needed part
number while at the same time increasing the accuracy of the
selection. In practically all cases each part is represented by
one and only one part number, which eliminates the necessity for
selecting a particular variation. In the few instances where an
option is offered on a particular model, the choice is clearly
spelled out.
With this type of arrangement the procedure for ordering spare
parts becomes extremely simple, as outlined below; Assume that it
is necessary to obtain a replacement presserfoot shoe for a U.S.
machine.
1. First, observe the model designation stamped on the nameplate
located on top of the main frame (Refer to Figure 11). Make
a note of the number.
2. Observe the particular machine serial number stamped on the
bottom rear of the base casting (Refer to Figure 11). Note
this number.
3. Select the catalogue for the model number noted in item (1).
This model is clearly printed on the cover of the catalogue.
4. Note that the Parts Catalogue is divided into ten sections,
each covering a different functional grouping of machine
parts. The part in question here, namely the presserfoot
shoe, obviously falls in Section J which covers the Presser
foot Group. Turn to this page and, referring to the
illustration, note the reference number attached to the
presserfoot shoe.
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INTRODUCTION (CONTINUED)
5. The page facing the illustration contains a lifting of each
part in the illustration together with the reference number
and the part number. Using the reference number noted in
item 4, find the part listing and part number. THIS IS THE
PART NUMBER TO ORDER. (PARTS CANNOT BE ORDERED BY REFERENCE
NUMBER.)
6. In order to completely eliminate any possibility of error,
with each part ordered it is essential that mention is made
of model designation (item 1 above), serial number (item 2
above), and part number (item 5 above).
After a very brief period of familiarization with the Parts
Catalogue it will be found that ordering spare parts is a simple
and quick procedure. Specifying model number, serial number and
part number provides a fool-proof coirbination of information which
will insure that the correct part is received in the shortest
possible time. Refer to Figure 12 for an illustration of a
properly prepared purchase order.
In using the Parts Catalogue it may be noted that certain part
numbers carry the prefix T. This designates an assembly which is
precision matched at the factory for proper operation and long
life. For this reason, the various components will not be sold
separately insofar as we cannot insure customer satisfaction
unless they are factory fitted. If a part of any of these assemblies
bearing the prefix T requires replacement, it will be necessary to
replace the entire assembly. The few assemblies involved are shown
in outline drawings on the illustration sheet, and play a critical
role in the proper functioning of the U.S. machine. In those cases
where the assemblies involved also include non-matched components
such as screws, these, of course, will be provided as separate
spare parts. Such components are shown on the illustration sheet
and listed on the parts sheet immediately below the affected
assembly.
Certain assemblies which do not require critical matching are
available either as complete assemblies or detail components to
suit the convenience of the customer. The complete assembly
carries a separate reference number and part number. The detail
components also have individual reference numbers and part numbers
and are listed immediately below the assembly in the parts list.
From the library of: Superior Sewing Machine & Supply LLC

Machine Model No.
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Machine Serial No.
FIGURE 11
DO NOT use reference numbers when ordering ports.
From the library of: Superior Sewing Machine & Supply LLC