US1694796A

US1694796A - Folding method and article produced thereby

Info

Publication number: US1694796A
Application number: US605374A
Authority: US
Inventors: Andrew R Ridderstrom
Original assignee: BEACON FOLDING MACHINE Co
Current assignee: BEACON FOLDING MACHINE Co
Priority date: 1921-06-24
Filing date: 1922-12-07
Publication date: 1928-12-11
Anticipated expiration: 1945-12-11

Description

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Dec. 1i, 1928.

Patented 11, 1928.

UNITED; STATES PATENT OFFICE.

ANDREW R. IRIDIDIl1`\,S'll3-O]!l1,Y 0F NAHANT, MASSACHUSETTS, ASSIGNOR TO BEACON FOLDING MACHIN E COMPANY, 0F LYNN, MASSACHUSETTS, A CORPORATION OF MAS- sAcnUsEmrs.

FOLDUWGTMETHOD AND ARTICLE PRODUCED THEBEBY'.

l original' application -nied'nme 24, 1921, serm No. 4sn,1r7.` nivzaed and this appiimion and timber 7, 1922, serial no. 605,374.

The present invention relates to methods of folding the margins of flexible sheet material, like shoe uppers, and pressing the folds or the like so formed and to articles produced by such methods. The invention is illustrated and described herein in connection with the folding and pressing of a binding strip around the edge of a boot or shoe upper to which it is attached, as in a copending application, Serial No. 480,177, tiled June 2l, 1921,

of which the present application is a division.

In the manufacture of bcots, and shoes it has been common practice to finish 'the edge of a part of a shoe upper by securing tozone face of the part, along an edge thereof, a strip of binding, then to coat the strip with a cement which is normally wet and sticky and then to' fold the free ortion of the strip progressively around tie edge of the shoe part and press it down upon the margin of the other face of said part.- Cement of the type referred to, owing to its liquid character, is liable to become smeared more or less upon the shoe part; and besides, remains sticky only for a limited interval during which, of course, the folding and pressing must take place.

According to a feature of the present invention a binding strip coated with a cement which is normally dry and non-sticky, but may be rendered sticky by the application to it of heat, is used; and heat is applied progressively to the str-ip to liquefy or render the cement sticky. This method is not only much cleaner than the old, wet-cement method; but

vis much more convenient in that the dry-ce- -mented work may be allowed to stand for an indefinite interval before being operated upon.

In the machine, chosen for illustration, by the use. of which a dry-cemented strip may be folded in accordance with the present inven tion, the strip is first acted upon by a wiper, after which it is tightly gripped and pulled tight between a feed point and a plow. It. is then folded over upon the leath'er sheet to which it is attached, being finally pressed down by a fold presser, the last-named element being maintained at a temperature. sufficient to render the dry cement sticky.

In the drawings, Fig. 1 is a view in elevation, partly in longitudinal section, and with parts omitted, of a machine by the use of which dry-cemented work. may be folded;

Renewed March 24, 1926 Fig. 2 is a plan `of the forward portion of the machine; Fig. 3 is a section of a .shoe upper, showing an unfolded binding strip attached thereto; Fig. 4 is a section similar to -Fig. 3, showing the binding strip in finally looking in the direction of the arrows.

The invention is illustrated inthe accom-4 panying drawings in connection with the folding of a binding strip 2, of cloth, silk and the like, around the edge 4 of a sheet of leather or other material 6, such as a boot or shoe upper. An edge 8 of the binding strip is sewed at 12 to a face 10 of the shoe upper along the edge 4, so that the sheet and the strip extend at an anule to each other from the secure d-

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 purpses of illustration, and

the elements of the article need not necessarily be of the relative dimensions shown. It may be desirable, for example, to fold an element of relatively large dimension over theedge of an element of relatively small dimension. For definiteness, the element that is to be folded will hereinafter be referred to in the specific-ation and the claims as the strip7 and the element about the edge of which the strip is to be folded will be hereinafter referred to as the sheet. stock, upper, work, etc., though the adopted terminology may not be strictly applicable to the specic article which may be under consideration.

The shoe upper is initially placed upon platform or support 24, Figs. 2 and 5, with the face 10 of the upper in contact with the support. An end of the free or unsecured edge 26 of the strip 2 is initially moved across and around the secured-

together edges

4 and 8, and into the space between an interior side, face 28 of a preferably toothed feed point 30 and aplow 32 that stands up intergrally from a plate 34. The machine beine set into operation. successive portions of t e unsecured edge or portion of the stri 2, near the stitches 12, arelint-ermittentl wlped tightly across the secured-together e ges4 and 8, or

away fromI thestitches, as shown` more par ticularly at 36, Fig. 4, by the combined ae tion -of a wiper 38 and a retainer 153 that presses down heavily at this time upon the upper directly opposite to the point of action the wiper. .It is very important to the subsequent operation that the Astripbe' wiped very tightly. The retainer-operating mechanism will not be described herein as it forms no essential part of the present invention. The retainer is provided with teeth 232, the

more firmly to hold the stock. In order to` enable the wiper 38 to operate, the strip 2 is 'progressively moved lightly or loosely by scribed in Letters Patent No. 1,527,396, grant-` ed February 24, 1925. The plow-folded portions of the strip are grip ed intermittently between the interior side ace 28, Fig. 6, of

i the feed point and the plow 32, becoming of the strip further an 42 is described in the thereby pulled tightly. The intermittent wiping, and folding and gripping operations arey performed upon the successive portions of the strip alternately during successive pauses in the feed. The plow folded portions are advanced by the feed vpoint and a cooperatin grally with the plow 32 u on a plate 34, to a combined folder and fol presser 42. The fold presser 42 folds the (plow-folded portions presses them down against the other face 16 of the sheet, as shown in Fig. 4. The preferred fold presser said Letters Patent and in Letters Patent No. 1,527,395, also granted February 24, 1925. These operations are y continued 'in timed relation toY one another until the whole strip' has become folded, as

, describedmore fullyin the said Letters Patl hesive in' this vdry ent No. 1,527,396. eference is made to the said Letters Patent fora fuller description of so much of the machine as is not fully disclosed herein, because unnecessary to an unjderstandingof the present invention.

The preferred wiper 38 is also fully def scribed m the Said Letters Patent No. 1,527,1-

396, and need not, therefore, be further de-` .scrihed here.

The Strip is ary/.cemented Wahine ad. -cemented condition the i strip 2 cannot adhere to the sheet 6. By heat ing the fold presser during the foldfpressing action, the 'dry cement will become liquefied,

and the parts so caused to adhere together.

An electrical heating unit4 55() is shown mounted in position in an oil cup 552 of the fold-presser cylindrical bearing 158. This construction provides a very compact, heated feed block 41, that is carried intefold presser. A thermostat 554,*Fig. 1, maintains the temperature of the fold presser within predetermined limits through causing the making and breaking of contact members 556. The thermostat, contact members and wiring connections are contained within abox 558 mounted'upon a bracket 560 secured to the frame of the machine, as shown in Fig. 2.

Manyv parts of the illustrative machine have been very briev described, or not dey scribed at all, because not essential to an un-l derstanding of the present invention, and because other such parts are well known in machines of the prior art. A fuller understanding of the illustrative parts ma be had by referring to the above-mentione application and Letters Patent, though many parts ent No. 1,527,396 and Witha particular kind l of work, therefore, it will be understood that this is for illustrative purposes only, and that the invention is of broader scope, unlimited exce t in so far as limitations may be specifically imposed in the appended clanns.

The machine which has been shown and described above is not herein claimed but forms the 'subject-matter of coending application Serial No. 740,735, file September 30, 1924, which, like the present application, is a division of application Serial No. 480,177., filed June 24, 1921.

What is claimed is:

1. The method of folding a dry-cemented strip around the edge of a sheet of material to one f aceof which, along said edge, an 'edge of the strip is secured so that the sheet and Inu the strip extend'frorn the secured-together edges at an angle to each other, said method comprising moving the dry-cemented strip across and around said secured-together edges, pressing the strip into even contact with the other face of the sheet, and heating the strip' while pressing it to liquefy the cement.

2. The method of folding a dry-cemented strip around the ed e of a sheet of material to one face of which, a ong said edge, an edge of the strip is secured so that the sheet and the strip extend from the secured-together edges other face of the sheet, .and heating the folded portions while pressing them to liquefy the cement.

3. The method of folding a dry-cemented strip around the edgeof a sheet of material to one face of which, along the said edge, an edge -ius 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'feeding the sheet and the strip step by step, moving portions of the unsecured edge of the strip across the secured-l together edges during pauses in the feed, folding the moved portions around thesecured-together edges during pauses in the feed subsequent to the pauses during which they were moved across the secured-together edges, pressing the foldedportions in to even contact with the other face of the sheet, and

heating the folded portions while pressing them to liquef the cem-ent.

4. The met od of folding materialthat comprises progressivel folding successive portions of the materia with a cement interposed between the folded portions of the material, the cement being normally in such c'onditionthatitisineffective to cause the folded portions of the material to adhere together, rendering the cement effective, and pressing the folded portions of the material together.

5. The method of folding material that comprises feeding the material, foldin at a predetermined position in the line o feed successive portions ofthe material with a cement interposed between the folded portions of the material, the cement being normally in such condition that it -is ineffective to cause the folded portions of the material to adhere together, rendering the cement effective, and pressing the folded portions of thematerial together.

6. The method of folding material a portion of which is provided with a cement in such condition that it is normally ineffective to cause the folded portions of the material to adhere together, the said method comprisin progressively folding successivev portions o the material with the cement interposed between the folded portions of the material,

Vrendering the cement effective, and pressing the folded portions of the material together.

7. The method of folding material a margin of which is provided with a cement that is normally in such condition that it is ineffective to cause the said margin to adhere to' the body of the material, the said method' comprising progressively folding successive' portions of the said margin over upon the body of the materialwith the cementinterposed between the said margin and the said body, rendering` the cement effective, and pressing `the folded marginalportions and the said body together. n

8. The method of folding material a margin of which is provided with a cement that is normally in such condition that'it -is ineffective to cause the said margin to adhere to the body of the material, the said method comprising feeding the material, folding at a predetermined position in the lineof feed successive portions of the said margin over upon the body ofthe material with the cement interposed between the said margin and the said body, renderin the cement effective, and pressing the olded marginal portions and the v'said body together. v 9. The method of folding a strip around the edge of a sheet ofmaterial to one faceof which, along the said edge, 'the strip is secured, the said method comprising progressively folding successive portions of the strip around the said edge with. a cement interposed between the strip and the sheet, the cement being normally in such condition that it is ineffective to cause the strip to adhere to the sheet, rendering the cement effective and pressing the folded strip and the sheet together.

10. The method of folding material a por- -tion of which is dr `cemented that comprises' progressively folding successive portions of the material with the dry cement interposed between the folded portions of the material,

liquefyingthe dry cement, and pressing the gin` and the said body portion, applying heat to the 'said margin to liquefy the d cement, and pressing the folded marginali the said body portion together. 1

.12. The method of folding material a margin of which is dry-cemented thatv com rises feeding the material, folding at a pre etermined position in the line of feed successive portionsofthe dry-cemented margin over upon the body portion of the material with the dry cement interposed between the said portions of the mar in and the said body portion,..

liquefyin t e dry cement, and pressing the successive y folded marginal portions and the said Body portion together.

13. The method of operating upon a piece of work consisting of a piece of sheet material to one face of which along an edge thereof a dry-cemented binding strip is attached' which comprises folding successive portions of the strip into position to be pressed against` the other face ofthe material, pressing thev folded portions .s'successively against said` other face and a Aplying heat progressively to the strip to liq efy the cement;

14. The method of operating upon a piece of Work consisting of apiece of sheet material to one face of which along an edge thereof a dry-cemented binding strip is attached which comprises progressively-bending successive portions of the` strip,- applying heat progressively to' the successively ent portions and pressing them againstthe other face of thesheet. t

15. The method of finishing a shoev upper that comprises coating a margin of the upper with an adhesive that is normally in such condition that it is ineffective to cause the said margin -to adhere to the bodyoi the upper, folding the said margin over upon the ody of the upper with the adhesive interposed between the said margin and the said body, rendering the adhesive effective, and pressing the fol-ded margin and the said body portion together. v

'16. The method of making shoe uppers whichcomprises coating with adhesive material one side of a strip,sewingy a margin of the coated strip to one face of the marginal portion of the upper, the coating being condi with which it contacts, folding t to the opposite face of the marginal portion of the upper.vw

17. As an article of manufacture7 asheet i of material and a stri stitched together along juxtaposed edges, t e strip being coated with an adhesive that is normally condi#I tioned so as not to stick to surfaces with which it contacts, the strip being adapted to be folded over the edge of the sheet and pressed into contact with the sheet, and the adhesive being adapted to be rendered sticky to cause the folded and pressed strip to adhere to the sheet.

In testimony whereof, I have hereunto subscribed my name this 4th day of December,

ANDREW R. RIDDERSTROM.

l l 1e strip over the edge of the upper; and causing the adhesive coated portion of the strip to adhere