US1899077A

US1899077A - Folding machine and method

Info

Publication number: US1899077A
Application number: US459894A
Authority: US
Inventors: Jerome P Byron; Andrew R Ridderstrom
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1921-04-09
Filing date: 1921-04-09
Publication date: 1933-02-28
Anticipated expiration: 1950-02-28

Description

Feb. 28, 1933. J. P. BYRON ET AL FOLDING MACHINE AND METHOD Filed Aprii 9. 1921 5 Sheets-Sheet l s ..W.. m 7 31 f W 34. 68 MW) Q5 0 fl Feb 28, 1933. J, P. BYRON ET AL FOLDING MACHINE AND METHOD Filed April 9. 1921 3 Sheets-Sheet 2 //7 Me n fora Java/776 P Byrw; ind/aw fP/adsnrffam i/fo/wejy Feb. 28, 1933. J, p, BYRON ET AL 1,899,077?

FOLDING MACHINE AND METHOD Filed April 9. 1921 3 Sheets-Sheet s Patented Feb. 28, 1933 UNITED :STATES JEROME I. BYRON, 0E LYNN, AND ANDREW R. RIDDEBSTROM, OF NBHANT, M ASSA PATENT OFFICE GHUSETTS, ASSIGNORS, BY MESNE AssIGNMENTs TO UNITED SHOE MACHINERY GORPORATION,'OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY FOLDING- MACHINE AN D METHOD Application filed April 9,"

The present invention relates to folding methods and machines, and more particularly to methods of and machines for folding a binding strip around the edge of a boot or shoe upper to which it is attached.

The object of the present invention 1s to provide an improved method of the abovedescribed character and an improved machine particularly adapted for use in carrying out the improved method.

In the drawings, Fig. 1 is a side elevation, partly in vertical section along the line 1-1 of Fig. 3, looking in the direction ofthe arrows, of a machine constructed accordmg to a preferred embodiment of the present invention; Fig. 2 is a section taken along the line 22 of Fig. 1, looking in the direction of the arrows; Fig. 8 is a front elevation, partly in vertical section along the line 3-3 of Fig 1, looking in the direction of the arrows; Fig. 4 is a horizontal section, taken upon the line 4-4 of Fig. 1, looking in the direction of the arrows; Figs. 5 to 8 inclusire are views showing successively assumed positions of portions of the mechanisms shown more particularly in Fig. 1; and Fig. 9 is a view correspondin to Fig. 7, showing certain parts enlarged for clearness.

The present invention will be hereinafter described in connection with the folding of a binding strip 402, Figs. 5 to 8, of cloth, silk and the like, around the edge 404 of a sheet of leather or other material 406, such as a boot or shoe upper, to which it is attached. The attaching is usuallyeflected by sewing an edge 408 of the strip to a face 410 of the shoe upper, along the .edge 404, so that the sheet and the strip extend at an angle to each other from the secured-

together edges

404 and 408. Thestitches are shown at 412. The angle between the sheet .and the strip is usually small, thesheet and the strip extending generally in more or less close parallelism, but the angle may be quite large. The particular article described above is chosen herein for illustrative purposes only, in order to fix the ideas, and the invention is not limitedto operation upon any specific article.

Tn practicing the invention, the shoe upper is placed with the face 410 resting upon 1921. Serial No. 459,894.

a platform or support 424. The unsecured or free edge 426 of the strip 402 is initially moved by hand into the space between two

gripper jaws

12 and 432. The machine being then set into operation, successive portions of the unsecured edge 426 of the strip 402 are intermittently gripped by the gripper jaws and pulled across the secured-

together edges

404 and 408, and folded tightly around these edges, in the direction of the arrow, Fig. 7. It is very important that the stri be pulled very tightly and folded while he d tightly. The folded portions are intermittently advanced by a feed mechanism to fold-presser 4 of well-known type that intermittently presses down the folded portions into even contact with the face 116 of the sheet, Fig. 8. The binding strip is caused to adhere to the sheet by cement. These operations are continued alternately in timed relation to each other, until the whole strip has been folded.

The machine shown in the accompanying drawings for the purpose of illustrating the invention is modelled somewhat after a well.

known machine disclosed in the patent to Diehl, No. 733,170, July 7, 1903, but suitably modified to adapt it to the carrying out of the method of the present invention, and reference is made to the said patent for a fuller description of such details as are not more fully described or illustrated herein, because not particularly related to this invention. The same reference characters are employed in the pr%ent drawings to indicate parts that correspond more or less closely to those shown in the patent. The base 1 of the machine is shown provided with an overhanging arm 2 in the forward portion of which is fitted a vertically reciprocating fold-presser bar 3 carrying the fold presser 4 and actuated by the usual crank-and-pitman connection with the forward end of the rock-shaft 5 having upon its rear end the crank pin 6, connected byvthe vpitman 7 with a crank pin 8, mounted between the balance wheel 9 and the rotary main shaft 10. The feed point 442, of wellknown construction, co-operates with the usual four-way feed block 441. The feed block .441 is driven by an old and frequently employed mechanism thatis shown partly b full lines and partly by dotted lines in ig. 3. The usual (gage 434 is employed to gulde the stock, an it is positioned so that the binding stri shall be engaged by the edge of the lat orm or support 424 and the unsecured e go of the strip maintained separated from the sheet, as 1s illustrated more particularly in'Figs. 1 and 5, to enable the gripper jaws 12 an 432 to secure a good grip thereon. I

The

ripper jaws

12 and 432 are mounted to oscil ate in a plane oblique to the foldpresser 4. The gripper jaw 12 is fixed upon one end of a slightly inclined rock-shaft 13, disposed substantially parallel with the hne of feed and mounted in suitable hearings in a swinging frame or carrier 14, pivoted upon centers 15, so as to reciprocate thereon transversely of the line of the feed, the shaft 13 having upon its opposite end a crank 16, carrying a pin 17 loosely fitted to rock within a slide block 18. The said end of the shaft 13 is bent slightly out of line with the body of the shaft, as shown in Fig. 3, to permit the

ripper jaws

12 and 432 to operate in near y a vertical plane. The reciprocating frame or carrier 14 is connected, intermediate its pivotal bearings and the rock-shaft 13 mounted thereon, by means of a link 19, to the shorter arm 20 of a substantially rightangular bell-crank lever Whose other and longer arm 21 is connected by a link 22 to a forked lever 23, pivoted upon the frame or carrier 14. The slide block 18 is adapted to be reciprocated between the prongs of the forked lever 23 to effect the actuation of the crank 16. The bell crank 20, 21 is fixed upon the outer end of a short intermediate shaft 24, mounted in suitable transverse bearings in the base of the machine and having upon its inner end a lateral crank-arm 25, deriving a vibrating motion from a pitman 26, connected therewith at one end by a ball-joint and at the opposite end embracing a ballcrank 27 upon the main shaft 10. As indicated in the drawings, the several rock-shafts and pivotal pins of the train of mechanism intermediate the shaft and the pitman 26 are disposed in lines parallel with the shaft.

By reference to Fig. 1 it will be observed that the bell-crank or rocker 20, 21 is so disposed upon its supporting rocksshaft 24 that in the lower position of the gripper jaws, illustrated in Figs. 1 and 5, both the arms 20 and 21 are substantially above the axis of the rock-shaft and, in the motions to and from such position, actuate the parts connected with the links 19 and 22 at nearly equal speeds; but as said bell-crank aproaches the full-line position indicated in ig. 1 of the above-named patent and in Fig. 7 of the present drawings, the shorter arm 20 maintains its substantially uniform speed of movement, while the longer arm nearly crosses. the center of oscillation, thus producing a differential speed of motion of the reciprocating members 19 and 22, and

therefore of the carrier 14 and forked lever tached to the latter by direct pivotal connections.

The gri per jaw 432 is automatically actuated by t e gripper jaw 12 through a gear 444 that is pivota ly mounted at 446 upon the gripper jaw 12 so as to rock thereon, and that meshes with ear 448 that is fixed to the jaw 432, and t at is similarly rockably mounted upon the gripper jaw 12 at 450. Rocking movement of the gear 444 is thus communicated to the gear 448 and, therefore, to the gripper jaw 432 to which the latter is fixed. The gear 444 is automatically rocked back and forth by a rack bar 452 that meshes with the gear 444 and that is slidably mounted in a holder 454. As the gripper jaw 12 is oscillated back and forth by 1ts above-described 'actuatin mechanism, it causes the rack bar to reciprocate in the holder 454, this reciprocation causing the rocking of the gears 444 and 448 and, therefore, the alternate opening and closing of the gripper aws.

As the gear 444 does not travel along a straight line, it is necessary, in order that the rack bar 452 may be malntained in mesh therewith, not only that the rack bar reciprocate, but that it be capable also of transverse movement. In the specific embodi-,

ment of the invention that is herein illustrat ed and described, the rack bar and its holder 454 are both permitted to oscillate transversely. To this end, the holder 454 is pivotally mounted about a stud 456 that is secured to a depending bracket 458. A coil spring 460 tends to maintain the holder 454 so as to hold the rack bar in mesh with the gear 444, but the spring yields to permit the rack bar being forced outward transversely in the direction of the arrow, Fig. 8, during the return movement of the gripper jaws after they have released their hold upon the binding strip.

In order that the rack bar shall not bind in the holder 454, the opening 462, Fig. 2, through which the rack bar slides is made greater than the thickness of the bar at its intermediate reduced portion 464. The face of the rack bar at 464 is made flat so that it may be engaged by a bearin plate 466.

The bearing plate is maintaine pressed flat spring-pressed plunger 468. The pressure of the spring 470 upon the plunger 468 may be adjusted by a thumb screw 472. By this construction, the rack bar is held tightlyin the holder 454, but is prevented from bindingthcreagainst during its reciprocation.

By reference to Figs. 5 to 8, inclusive, it

will be seen that the unfolded portions of the,

sheet is horizontal and unfolded portiolit of.

the strip are extending they are gripped.

The invention has beendescribed herein as embodied in a special machine of well downwardly when known type, because leading to clearness ofunderstanding and brevity of description, without confusing the essential novelty of the invention. It will be understood, however, that the invention itself is not restricted to any particular machine, and that modifications may be made by persons skilled in the art without departing from the spirit of the invention as defined in the appended claims.

What is claimed as new is:

1. A machine of the class described having, in combination, two gripper jaws, means for actuating one of the jaws, a gear pivoted upon said jaw, a gear meshing with the firstnamed gear fixed upon the other jaw, and a gear meshing with the pivoted gear movable upon the actuation of the said first-named jaw to effect the movement of the pivoted gear and, through the latter, of the secondnamed gear.

2. 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 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,a gage for guiding the sheet positioned so that the "strip shall be engaged by the edge of the support.

and means for gripping the edge-engaged strip and moving it across the secured-together edges.

3. A. machine of the class described having, in combination, two gripper jaws, means for actuating one of the jaws along a curved path, a gear pivoted upon said jaw, a gear meshing with the first-named gear fixed upon the other jaw, a rack bar meshing with the pivoted gear movable upon the actuation of the said first-named jaw to effect the movement of the pivoted gear and, through the latter, of the second-named gear, a movable holder in which the rack bar is adapted to slide and means whereby the rack bar is held tightl in the holder.

4. machine for folding a strip around the ed e of a sheet of material to one face of which, along 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, means for feeding the sheet, means for engagin the strip to maintain the unsecured edge 0 the strip separated from the sheet while the sheet is fed, and means for gripping theiuns'ecured edge of the strip and moving it across the securedtogether edges.

5. 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 secured so that the sheet and the strip extend from the secured-together edges at an angle to each other, a ridge being adapted to be formed at the junction be tween the sheet and the strip by the folding of the strip around the edge of the sheet, the said method comprising supporting the sheet upon a support having an edge with the ridge projecting beyond the said edge of the support, and folding the strip around the secured-together edges.-

6. A machine for folding a strip around the edge of a sheet of material to one face of whichfalong the said edge, the strip is secured, there being a ridge at the junction between the sheet and the, strip, the said machine having, in combination, a support having an edge, the sheet being adapted to be supported upon the support with the ridge projecting beyond the said edge'of the support, means for foiding the strip around the secured-together edges and means for feeding the sheet and the strip with the sheet supported upon the support and the ridge projecting beyond the said edge of the support.

7. A machine for folding a strip around the the edge of sheet of material to one face of which, aiong the said edge, an edge of the strip is secured, there being a ridge at the junction between the sheet and the strip,

the said machine having, in combination, a

support having an edge,the sheet being adapted to be supported upon the support with the ridge projecting beyond the said edge of the support, and means for folding the strip around the secured-together edges,

, between the sheet and thestrip, the said machine having, in combination, means for foldoperating with the support for pressing the strip against the other face of the sheet.

9. The method of folding a strip around the edge of a sheet of material to one face of which, along the said edge, the strip is secured, there being a ridge at the junction between the sheet and the strip, the said method comprising supporting the sheet upon a support havin an ed with the ridge engaging the said e ge of t e support and pro'ecting beyond the said edge 0 the support, olding the strip around the said edge of the sheet, and pressing the strip against the other face of the sheet.

10. A machine for folding a strip around the edge of a sheet of material to one face of which, alon the said edge, the strip is secured, there eing a ridge at the junction between the sheet and the strip, the said machine having, in combination, a support having an edge upon which the sheet is adapted to rest with the ridge engaging the said edge of the support and projecting beyond the said edge of the support, and means for folding the stri around the said edge of the sheet.

11.; he method of folding astrip around the edge of a sheet of material to one face of which along the 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 method comprising grippin the strip whileit is in a position in which t e angle included between it and that face of the sheet material to which the strip is attached is less than one hundred and eighty degrees, folding the strip around the secured-together edges, and pressing the strip into contact with the other face of the sheet.

12. The method of folding a strip around the edge of a sheet of material to one face of which alon the edge an edge of the strip is secured so t at the sheet and the strip extend from the secured-together edges at en angle to each other, the said method comprising grip ing the strip while it is in a position in .whic the angle included between it and that face of the sheet to which the stri is attached is less than one hundred and eig ty degrees, pulling it across and around the secured-together edges and pressing it against the other face of the sheet.

13. A machine for folding a strip around the edge of a sheet of material to one face of which alon said edge an edge of the strip is secured so t at the strip and the sheet extend from the secured-together edges at an angle to each other, said machine having in combination, two gripper jaws adapted to grip intermittently successive ortions of the strip whlle the angle includ between said ortions and that face of the material to w ich the strip is attached is less than one hundred angle to each other, said machine having, in,

combination, means for intermittently feeding the sheet, means for gripping successively advanced portions of the strip while the angle included between said portions and that face of the sheet to which the strip is attached is less than one hundred and eighty degrees, and for folding said portions around the securedtogether edges during pauses in the feed, and means for pressing the successively folded portions into contact with the other face of the sheet.

15. 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 secured so that the stri and the sheet extend from the secured-toget er edges at an angle to each other, said machine having, in combination, a support for the sheet, means'for feeding the sheet over the support with the strip extending downward, means for gripping downwardly extending portions of the strip and folding them around the securedtogether edges, and means for pressing them against the 11 per face of the sheet.

16. A mac ine for folding a strip over the edge of a sheet of material to one face of which, along 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, two gripper jaws adapted to gri intermittently successive portions of the strip and fold them about said edges, means for operating one ripper jaw from the other, a fold-presser, and means for actuating said other jaw and the fold-presser.

In testimony whereof, we have hereunto subscribed our names this 31st day of March,

JEROME P. BYRON. ANDREW R. RIDDERSTROM.