US1725159A

US1725159A - Signments

Info

Publication number: US1725159A
Authority: US
Publication date: 1929-08-20
Anticipated expiration: 1946-08-20

Description

1929- A. R. RIDDERSTRO M 1,725,159

7 FOLDING MACHINE AND METHOD Original Filed Sept. 1. 1920 In venior v AndrewR.Ric/der$from.

Afforne g Patented Aug. 26, 1929.

TATE.

ANDREW R. RIDDERSTROM, OF NAHANT, MASSACHUSETTS, A$SIGNOR, BY MESNE AS- SIGNIVIENTS, TO UNITED SHOE MACHINERY- CORPGRATION, OF PATERSON, NEW JERSEY, A CORPQRATION OF NEW JERSEY.

' roma ne MACHINE AND METHOD.

Original application filed September 1, 1820, Serial No. 407,336. Divided and this application filed August 11, 192.2. Serial No. 581,154.

The present invention relates to folding methods and machines, and more particularly tomethods of and machines for folding a binding strip around the edge of a boot or shoe upper to which it is attached. plication is a division of a copending application, Serial No. 407,336, filed September 1, 1920.

The binding strip is usually sewed upon a face of the upper along an edge thereof, after which the strip is folded around the said edge and into even contact with the opposite face. In order that the binding strip, after folding, may lie evenly and smoothly against the said opposite face, it is necessary that the strip be first wiped tightly across the edge to which it is secured and then pulled and held tightly during the folding operation and while it is pressed against the said opposite face; and it is necessary also that the strip be folded exactly at the proper points or lines, and not to one side thereof. This is very diflicult of achievementeven by hand, and no successful mechanical means for operating upon shoeupper binding strips have'heretofore been devised. Binding strips are therefore still folded laboriously, clumsily and unsatisfau torily by hand, the various operations being performed separately at different times, wasting much time and adding greatly to the cost.- Tt is an object of the present invention to provide an improved method of and machine for folding binding strips. With this and other objects in view, the invention consists of the method and the machine a. preferred embodiment of. which is hereinafter described, illustrated in the accompanying drawings and defined in the appended claims.

In the drawings, Fig. 1 is a perspective view of portions of the upper, forward part of the machine; Fig. 2 is a section of a shoe upper, showing an unfolded binding strip attached thereto Fig. 3 is a section similar to Fig. 2 showing the binding strip in finally folded position upon the upper; Fig. 4 is a the like, around the edge 4 ofa sheet of leather or other material 6, such as a boot or shoe upper. An edge 8 of the binding strip is stitched at 12 to a face 10 of the shoe upper along the edge 4, so that the sheet and the strip extend at an angle to each other from the secured-together edges 4 and 8.

It will be understood that the invention is equally applicable to other articles than that which is herein chosen for purposes of illus .mounted upon a holder 93 that is secured, as

by a set screw 95, to a support 94 that rocks about a rod 96. The machine being setinto operation, successive portions of the strip 2 near the stitches 12 are wiped tightly across the secured-together edges 4 and 8, or: away from the stitches, as shown more particularly at 36, Fig. 3, by the combined dragging or crowding action against the stock of a wiper 321, Fig. 4, and a retainer 153 or 253, as the stock is fed forward through the machine. In order to enable the wiper 321 to operate, the strip 2 is progressively moved lightly or loosely by the operators fingers from the position of Fig. 2 more or less into the plane of the shoe-upper sheet 6, as the shoe upper is fed forward through the machine. The successively wiped portions are initially folded around the secured-together edges 4 and 8,

by the plow 32 and they are gripped bet-ween the feed point and the plow 32. The wiping, and folding and gripping operations are performed upon the successive portions of the strip alternately. The plow-folded portions are then advanced by the feed point 30 and a cooperating feed block 41 to a combined folder and fold presser 42. The feed block 41 is carried inte rally with the plow 32 upon the plate 34. The preferred rolling fold presser 42 is described in Letters Patent No. 1,527 ,395, granted February 24, 1925. The

I fold presser 42folds the plow-folded portions of the strip further and presses them down against the other face 16 of the sheet, as shown 1n Fig. 3. These operations are continued in timed relation to one another until the whole strip has become folded, as described more fully in Letters Patent No. 1,527,396, also granted February 2 1, 1925. Reference is made to the said Letters Patent for a fuller description of so much of the machine as is not fully disclosed herein, be-

, cause unnecessary to an understanding of the ing support 94, as described in the aforesaid Letters Patent No. 1,527,396, the separated feed point and feed block return from the fold presser toward the wiper to take a new hold upon the stock. The feed elements are thus returned in preparation for the next forward movement of the feed elements. Portions of the strip 2 that have previously been wiped by the wiper 321 are during this return movement engaged by the plow, and by it given an initial fold, as will be clear from Fig. 5; p

The retainer 153 disclosed in the said Letters Patent No. 1,527,396 acts to clamp the stock and thus prevent it being pushed outward away from the operating instrumentalities of the machine. The j retainer acts also to hold the stock firmly against accidental movement during the return movement of the feed elements. It may, if desired, be caused further to cooperate with the wiper, so as to press down heavily upon the upper directly opposite to the point of action I of the wiper, as illustrated in Figs. 1 and 6.

A still simpler construction is shown 'in Fig. 6. Here the retainer 253 acts continuousl a ainst the stock so as to ress down upon the stock during the dragging action.

The wiper thus cooperates with the retainer to wipe or stretch or crowd the strip tightly away from the stitch line. A spring 254 may be employed to effect this continuous action. The retainer 253 may be pivoted at 256,

i or otherwise mounted, upon a stationary part of the machine.

To minimize possible inur1ous effects upon the w1per when the stock is removed, the retainer point 1s, 1n th1s construction, preferably made smooth, without teeth. A retainer of this simpler character is particularly adapted for use with a wiper that is immovable in a direction at an angle I to the line of feed. This is because the wiping action of a wiper of this character is entirely due to dragging or crowding the stock over the wiper.

The wiping is effected during the forward movement of the feed elements towards the fold 'presser. The feed elements then return towards the wiper. As the plow is rigid with the feed block, it acts also as a gage. The folding operation of the plow continues until the plow is returned to a point very close to the wiper. Towards the end of the return movement of the feed elements, the feed point descends obliquely to the plow, as described in the said Letters Patent No. 1,527,396, effecting frictional engagement of the strip between the latter and the feed point. The feed point and the feed block then clamp the material in preparation for the next forward feed movement. The'feed point and the plow maintain their tight hold upon the strip during the forward movement of the feed elements until the feed point again rises at the end of the said forwardmovement. As the feed point, the feed block and the plow move forward, they drag the stock over the wiper. It is at this time that the wiping is effected by the raised member 321. The stock is solidly gripped at all times during the forward movement, of the feed elements permitting no opportunity for the stock to slip, and the line of fold of the strip about the edges 4 and 8 is predetermined. The initial, predetermined fold is advanced under the fold presser, by

which it is further folded and pressed. The

above-described cycle of operations is thenof the upper to which it is sewed after the binding strip has first been wiped across the edge of the upper by hand or in some other manner. It is essential to the successful operation of the illustrative machine that the wiping, folding, etc, be performed in the same machine. Hand wiping is difiicult to perform properly. If the wiping. is performed by hand'before the upper is introduced into the machine, the machine will be unable to correct the errors of hand wiping. This is particularly true when, as is usually the case, cement is employed to cause the strip to stick to the upper after it is folded. The cement causes the strip to stick to the upper in its hand-wiped condition, resisting the action of the machine wiper, so that the latter can not effect the wiping action properly. If the strip is not wiped tightly to start with, it can not, of course, fold properly. 1 Y

Many parts of the illustrative machine that are not essential to an understanding of the present invention have not been illustrated lll) - and described in detail, reference being made for a fuller understanding thereof to the above-mentioned application and Letters Patent.

It will be understood that the invention is not restricted to the exact embodiment there of that is herein illustrated and described. Changes and modifications will therefore obviously occur to persons skilled in the art, and

these are considered to be embraced within the spirit and scope of the present invention, as defined in the appended claims.

- The invention having been thus illustrated and described, what is claimed as new is 1. A machine for wiping a strip across the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the strip and the sheet extend from the secured-together edges at an angle'to each other, the said machine having in combination, a support upon which the sheet is adapted to rest, means for feeding the sheet over the support, and a rigidly secured member raised above the support for Wiping the strip across the secured-together edges as the sheet is fed over the support.

2. A machine for wiping a strip across the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the strip and the sheet extend from the secured-together edges at an angle to each other, the said machine having, in combination, a support upon which the sheet is adapted to rest, a bracket, means for feeding the sheet over the support, and a member rigidly secured to the bracket and raised above the support in a position diagonally disposed to the direction of feed for wiping the strip across the secured-together edges as the sheet is fed over the support.

3. A machine for wiping a strip across the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the strip and the sheet extend from the secured-together edges at an angle to each other, the said machine having, in combination, a support upon which the sheet is adapted to rest, means for feeding the sheet over the support, and a rigidly securedmember raised above the support in a position diagonally disposed to the direction of feed for wiping the strip across the secured-together edges as the sheet is fed over the support.

4. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said'edge, an edge of the strip is secured so that the strip and the sheet extend from the secured-together edges at an angle to each other, the said machine having, in combination, a support upon which the sheet is adapted to rest, means for feeding the sheet over the support, a rigidly secured member raised above the support for Wiping the strip'across the secured-together edges as the sheet is fed over the support, and a plow for folding the wiped portions of the strip around the secured-together edge 5. A machine as described in Claim 4, in which the plow is spaced from the wiper in the line of feed.

6. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the strip and the sheet extend from the secured-together edges at an angle to each other, said machine having, in combination, a support upon which the sheet is adapted to rest, means for feeding the sheet over the support, a rigidly secured member raised above the support for wiping the strip across the secured-together edges as the sheet is fed over the support, and means for gaging the sheet and folding the wiped portions of the strip around the secured-together edges.

7. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the strip and the sheet extend from the secured-together edges at an angle to each other, the said machine having, in combination, a support upon which the sheet is adapted to rest, means for feeding the sheet over the support, a rigidly secured member raised above the support in a position diagonally disposed to the direction of feed for wiping the strip across the securedtogether edges as the sheet is fed over the support, and means for folding the wiped portions of the strip around the secured-together edges and pressing the folded portions of the strip into even contact with the other face of the sheet.

8. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the strip and the sheet extend from the secured-together edges at an angle to each other, the said machine having, in combination, a support upon which the sheet is adapted to rest, means for feeding the sheet over the support, a rigidly secured member raised above the support in a position diagonally disposed to the direction of feed for Wiping the strip across the securedtogether edges as the sheet is fed over the support, means for gaging the sheet and fold ing the wiped portions of the strip around the secured-together edges, and means for pressing the folded portions of the strip into even contact with the other face of the sheet.

' 9. A machine for wiping a strip across the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, means for feeding the sheet, and a wiper acting to wipe the strip across the secured-together the secured-together edges by dragging against the strip as the sheet is fed, the wiper being stationary during the operation of the machine.

10. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, means for feeding the sheet, a wiper having a raised portion diagonally disposed to the direction of feed acting to wipe the strip across the securedtogether edges by dragging against the strip as the sheet is fed, and means for folding the wiped strip around the secured-together edges. g g

11. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, a wiper having a raised portion diagonally disposed to the direction of feed acting to wipe the st "ip across edges by dragging against the strip as the sheet is fed, means for folding the wiped portions of the strip around the secured-together edges, and means for feeding the sheet and pressing the folded portions of the strip into contact with the other face of the sheet.

' 12. A machine-for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, a member for engaging the sheet and the strip at a point where the strip is secured to the sheet within the angle between the said one face of the sheet and the strip, the saidmember being stationary during the operation of the machine, a member for engaging the margin near the said edge along the other face of the sheet at a point opposite to the point of action of the first-named member, means for applying pressure to one of the members to cause the said one member to exert a force toward the other member, and means for folding the strip around the secured-together edges.

13. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, a raised member'for engaging the sheet and the strip at a point where the strip is secured to the sheet within the angle between the said one face of the sheet and the strip, the said member being 14;. A machine. for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip.

extend from the secured-together edges at an angle to each other, the said machine having, in combination, a support upon which the sheet is adapted to rest, means for feeding the sheet over the support, a rigidly secured member raised above the support for 'engaging the sheet and the strip at a point where the strip is secured to the sheet Within the angle between the said one face of the sheet and the strip, a member for. pressing upon the other face of the sheet at a point opposite to the point of action of the first named member, and means for folding the strip around the secured-together edges.

15. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having,

in combination, a support upon whichthe sheet is adapted to rest, means for feeding the sheet over the support, a rigidly V secured member raised above the support for engaging the sheet and the strip at a point where the strip is secured to the sheet within the angle between the said one face of thesheet and the strip, a member for pressing upon the other face of the sheet at a point opposite to the point of action of the first-named member, and means for folding the strip around the secured-together edges and pressing'it into contact with the other face. of the sheet.

16. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine have 1n th: sheet is adapted to rest, means for feeding the sheet over the support, a rigidly secured member raised above the support for engag ing successive portions of the sheet and the strip at points where the strip is secured to the sheet within the angle between the said one face of the sheet and the strip, a member for pressing upon the other face of the sheet at points opposite to the points of action of the first-named member, and means for folding successive portions of the strip successively around the secured-together edges and pressing them into contact with the said other 1 face of the sheet.

17. A machine for folding a strip around in combination, a support upon which sheet as the sheet is fed over the support, the

member being stationary during the operation of the machine, means for folding the strip around the secured-together edges, and means independent of the member for pressing the strip into contact with the other face of the sheet.

18. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, a support upon which the sheet is adapted to rest and over which the sheet is adapted to be fed, a member raised above the support in a position diagonally disposed to the direction of feed adapted to engage the'sheet as the-sheet is fed over the support, the member being stationary during theoperation of the machine, means for folding successive portions of the strip around the secured-together edges at a position in the line of feed forward of the member, .and means for pressing the folded portions of the strip into even Contact with the other face of the sheet. V

19. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, means for moving portions of the unsecured edge of the strip across the secured-together edges, means for engaging the margin near the said-edge along the other face of the sheet at a point opposite to the point of action of the moving means, and means for maintaining the moving means and the engaging means continuously pressed yieldingly towards each other.

v20. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, the said machine having, in combination, a Wiper for engaging the sheet and the strip at a point where the strip is secured to the sheet within the angle between'the said one face of the sheet and the strip and for wiping the strip from the said point across the secured-together edges, a member for engaging the margin near the said edge along the other face of the sheet at a 'rection to pull said free point opposite to the point of action of the wiper, means for maintaining the wiper and the engaging means continuously pressed yieldingly towards each other, and means for folding the strip around the secured-together edges and pressing it into contact with the said other face of the sheet. a v21. A machine for folding a piece of work, having in combination, a support for the work, feeding, folding and folding-pressing members, and a binding-engaging wiper located beneath the work, the operative face of which lies at an angle to the line of feed.

22. The method of wiping out a binding strip which is attached at one edge by a line of stitches to the edge of a piece of sheet material which comprises engaging the free portion of the strip adjacent its line of attachment and intermittently wiping a free portion of the strip obliquely with respect to said line across said line.

23. A machine for operating upon a piece of work which consists of a pieceof sheet material to one side of which a strip of binding is attached having, in combination, a support, means for feeding the work over the support with that side of the work to which the binding is attached resting upon the support, a wiper projecting above the support, extending at an angle to the line of feed and adapt-.

ed when the work is fed over it to wipe a free portion of the binding over the attached portion thereof, and means for folding the remaining free portion of the binding about the edge of the material and for pressing it into place.

24. A machine for operating upon a piece of work which consists of a piece of sheet material toone side of which a strip of binding is attached having, in combination, a wiper held from movement in the line of feed and extending in a direction oblique to said line, means for feeding over the wiper that side of the work to which the binding is attached so as to cause the binding to be pulled out, and

means for thereafter foldingthe binding over.

the edge of the material.

'25. In a machine for operating upon a piece of work consisting of a piece of sheet material to which a strip ofbinding is attached the combination with means for feeding the work of a stationary wiper over which the work is fed, said wiper extending in a direction oblique to the line of feed so as to exert a drag upon the free portion of the binding in a diportion over the attached portion thereof.

26. A machine for operating upon a piece of work consisting of apiece of sheet material to which a strip of binding is attached having, in combination, a support for the work, means for feeding the work intermittently overthe support, a member arranged at an angle to the line of feed and adapted to wipe a free portion of the binding strip ob- .;leaves the wiping member.

27.. A machine for operating upon a piece of work, consisting of a piece of sheet material and a strip of fabric which are attached together near two edges of the respective articles having, in combination, a support for the work, means for feeding the work intermittently over the support, and a member for wiping the free portion of the strip over the attached portion in a direction oblique to the line of feed.

28. A machine for operating upon a piece of work which comprises a piece of sheet material to an edge of which the edge of a binding strip is attached by line of stitches having, in combination, means for supporting the work, and means for intermittently wiping successive parts of a free portion of the binding obliquely across the line of attachment.

29. A machine for operating upon a piece of work which comprises a piece of sheet material to an edge of which the edge of a binding strip is attached by a line of stitches having, in combination, means for supporting the work, means for intermittently wiping successive parts of a free portion of the binding obliquely across the line of attachment, and means for folding the remaining free portion of the binding about the edge of the material and for pressing it down upon the margin of the material.

30. A machine for operating upon a piece of-work consisting of a piece of sheet material and a binding strip which are attached to each other near two edges of the respective articles, having in combination, a support for the work, means for feeding the work intermittently over the support, and a member held from movement in the line of feed adapted to engage the strip adjacent to its line of attachment and to act during the intermittent feed movements to wipe free portions of the strip obliquely with respect to said line across said line.

work consisting of a piece of sheet material and a binding strip which are attached to each other near two edges of the respective articles by a line of stitches, the said method comprising feeding the work, and engaging the work with a member immovable in a direction at an an le to the line of feed to move the strip tightly away from the line of stitches.

32. A method of operating upon a piece ofwork consisting of a piece ofsheet material and a binding strip which are attached to each other near two edges of the respective articles by a line of stitches, the said method comprising engaging the work with a member that is immovable in a directlon atan angle to 31. A method of operating upon a piece of the line of stitches and relatively moving the work and the member to move the strip tightly and a binding a strip which are attached to each other near two edges of the respective .articles by a line of stitches, the said method comprising engaging the work with a mem-' her that is immovable in a direction at an angle to the line of stitches, and relatively moving the work and the member in a direction such as to cause the member to move the strip tightly away from the line of stitches.

34. The method of folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is stitched so that the sheet and the strip extend from the stitched-together edges at an angle to each other, the said method comprising feeding the work, engaging the work with a member that is immovable in a direction at an angle to the line of feed to move the strip tightly away from the stitches, and folding the strip around the secured together edges and against the other face of the sheet.

35. The method of folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is stitched so that the sheet and the strip extend fromthe stitched-together edges at an angle to each other, said method comprising feeding the work, engaging successive portions of the work with amember that is immovable in a direction at an angle to the line of feed to move: the'successive portions of the strip tightly away from the' stitches, and folding the successive portions of the strip around the secured-together edges and against the other face of the sheet.

36. The method of folding a strip around the edge of a sheet of material to oneface of which, along the said edge, an edge'of the strip is stitched so that the sheet and the strip extend from the stitched-together edges operate with the memberin moving the strip tightly away from the stitches, maintaining the member and the engaging means yieldingly pressed towards each other, and folding the strip around the secured-together edges and against the. other face of the sheet.

37. A machine for operating upon a piece of work consisting of a piece of sheet material and a binding strip which are attached to each other near two edges of the respective articles by a line of stitches, the said machine having, in combination, a support upon which the work is adapted to be supported 38. A machine for operating upon a piece of Work consisting of a piece of sheet material and a binding strip which, are attached to each other near two edges of the respective articles by a line of stitches, the said machine having, in combination, a support uponwh1cn the work 1s adapted to be supported, a

member immovable in a direction at an angle to the line of stitches for engaging the work, and means for relatively moving the worl; and the member to move the strip tightly away from the line of stitches.

39. A machine for operating upon a piece of Work-consisting of a piece of sheet material and a binding strip which are attached to each other near two edges of the respective articles by 'a line of stitches, the said machine having, in combination, a support upon which the work is adapted to be supported, a mem- I ber immovable in a direction at an angle to the line of stitchesfor engaging the work, and means for relatively moving the work and the member in a direction such as to cause the member to move the strip tightly away from the line of stitches.

40. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is stitched so that the sheet and the strip extend from the stitched-together edges at an angle to each other, the said machine having, in combination, means for feeding the work and folding the strip around the secured-together edges and against the other face of the sheet, and means immovable in a direction at an angle to the line of feed for engaging the work to move the strip tightly away from the stitches.

ll. A'machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is stitched so that the sheet and the strip eirtendfrom the stitched-together edges at an angle to each other, the said machine having, in combination, means for feeding the work and folding successive portions of the strip around the secured-together edges and against the other face of the sheet, and means immovable in a direction at an angle to the line of feed for engaging successive portions of the work to move the said successive portions of the strip tightly away from the stitches.

42. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is stitched so that the sheet and the strip extend from the stitched-together edges at an angle to each other, the said machine having, in combination, a member for engaging the work to move the strip tightly away from the stitches, means for engaging the margin near the said edge along the other face of the sheet at a point opposite to the point of action of the member to cooperate with the member-in moving the strip tightly away from the stitches, means for maintaining the member and the engaging means continuously pressed yieldingly towards each other, and means for folding the strip around the stitched-together edges and against the other face of the sheet.

4-3. A machine for folding a strip around the edge of a sheet of material to one face of which, alon the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, said machine having, in, combina on, means for feeding the sheet,

a wiper for wiping the strip across the secured-together edges as the sheet is fed, and a plow for folding the wiped portions of the strip "around the secured-together edges.

td. A machine for folding a strip around the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, said machine having, in combination, means for feeding the sheet, a wiper for wiping the strip across the securedtogether edges as the sheet is fed, a plow for initially folding the wiped portions of the strio around the secured-together edges, and means for pressing the folded portions of the strip against the other face of the sheet.

45. A machine for folding a strip across the edge of a sheet of material to one face of which, along the said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, said machine having, in combination, means for feeding the sheet, and a wiper acting to wipe the strip across the secured-together edges by dragging against the strip as the sheet is fed.

46. A machine for operating upon a piece of work consisting of a piece of sheet material and a binding strip which are attached to each other near two edges of the respective articles by a line of stitches, the said machine having, in combination, a member immovable in a direction at an angle to the line of feed for engaging one face of the sheet and the strip at the stitch line to move the strip tightly away from the stitch line, and a retainer for pressing against the other face of the sheet at a point opposite to the point of action of the member.

47. The method of folding a strip around the edge of a sheet of material to one face of which, along said edge, an edge of the strip is stitched so that the sheet and the strip extend from the stitched-together edges at an angle to each other, said method comprising engaging the said face of the sheet and the strip at the stitch line with a member that is immovable in a direction at an angle to the line of feed and continuously pressing against the other face of the sheet at a point opposite to the point of action of the member to move the strip tightly, away from the stitch line, initially folding the moved strip around the stiched-together edges and finally folding and pressing the initially folded strip against the other face of the sheet. 7

48. A machine for folding a strip around the edge of a sheet of material to one face of which, along said edge, an edge of the strip is stitched so that the sheet and the strip extend from the stitched-together edges at an angle to each other, said machine having, in combination, a member immovable in a directionat an angle to the line of feed for engaging the said face of the sheet and the strip at the stitch line to move the strip tightly away from the stitch line, a retainer for pressing against the other face of the sheet at a point opposite to the point of action of the member, means for initially folding the moved strip around the stitched-together edges, and means for finally folding and pressing the initially folded strip against the other face of the sheet.

49. A. machine for folding a strip around the edge of a sheet of material to one face of which, along said edge, an edge of the strip is stitched so that the sheet and the strip extend from the stitched-together edges at an angle to each other, said machine having, in combination, a member immovable in a direc tion at an angle to the line of feed for en gaging the said face of the sheet and the strip at the stitch line to move the strip tightly away from the stitch line, a retainer for continuously pressing against the other face of the sheet at a point opposite to the point of action of the member, a plow for initially folding the moved strip around the stitched-together edges, and means for final ly folding and pressing the initially-folded strip against the other face of the sheet.

In testimony whereof, I have hereunto subscribed my name this 10th day of August,

ANDREW R. RIDDERSTROM.