US1442205A - Stripping- machine - Google Patents

Description

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Patented Jan. 16, 1923.

UNITED STATES PATENT OFFICE.

ERASTUS E. WINKLEY, OF LYNN, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, F PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Application filed December 31, 1919.

To all whom t may concern:

Be. it known that I, ERAsTUs E. VVINKLEY,

a citizen of the United States, residing at Lynn, in the countyi of Essex and State of Massachusetts, have invented certain new and useful Improvements in Stripping Machines; and II do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates Vto a machine for cutting sheets of material into pieces or strips by the repeated operation of its cutting instrumentalities, and is designed primarily as an improvement of the stock-cutting machine disclosed and claimed in applicants copending application Serial No. 125,977, filed October 16, 1916, (Patent No.

1,412,225, Apr. 11, 1922) although the several features of the invention are also applicable to other machines of this general class.

In Letters Patent No. 1,285,531, granted November 19, 1918, to the present applicant,

a method of making polygonal heels is disclosed which involves building up a multiple hee-l block by superposing on each other in stepped relation a plurality of pasted strips of heel material of graded widths, the blocks thus formed being subse uently cut off into single heel blocks.

. he machine of the above mentioned Patent No. 1,412,225 is intended for use in carrying out in part the method above referred to, the machine being adapted to progressively cut a series of strips or pieces of uniform width from a sheet of heel material and to deliver said pieces in stacked relation in convenient form for subsequent handling during the multiple heel block assembling operation. In order to build a stepped heel block comprising graded widths of strips or, in other words, strips which vary in width according to a predetermined plan, it is contemplated to provide a machine to cut the requisite number of series of uniform strips of the required graded widths, from which the component graded strips are selected and assembled. The machine is also provided with means to enable the operator to manually adjust or set it periodically to cut several series of STRIPPING MACHINE.

Serial No. 348,561.

strips of different uniform widths as may be desired.

One of the objects of the present invention 1s to provide an improved type of machine of this general class which may be utilized to material advantage in practicing the methodset forth in Letters Patent No. 1,285,531 already referred to, and which will obviate the necessity of frequent manual ad- Justments and consequent non-productive periods, incident to the use of the prior machine, and moreover which shall be particularly adapted to easily and expeditiously produce a successive like series of strips of the desired graded sizes or widths with reliability and economy of time and expense.

Accordingly, one featu-re of the invention resides in the provision in a machine of the above indicated character of automatic means which may be preliminarily set in accordance with the specifications of the work to be done, and which shall function after each operation of the cutting instrumentalities to automatically readjust certain parts of the machine so as to cause it to cut and deliver in stacked relation successive like series of strips of the desired graded sizes or widths.

Another object of the inventionis to provide means for eliminating waste and preventing the cutting of defective strips that might result from improper feeding and positioning of the sheets prior to each cutting operation.

To this end, another feature of the invention contemplates the use of a mechanism embodying a plurality of detectors for engaging the forward edge of the sheet as it is fed and detecting any angularity between it and the cutting knife, under which condition the operation of the machine is discontinued through the action of an automatic tripping mechanism before the cutting action occurs and a defective strip is produced.

These and other objects of the invention and features by which they are obtained will become apparentto those skilled in the art from the following description of the preferred embodiment of 'the invention illustrated in the accompanying drawings, in which Figure 1 is a view in front elevation of a machine constructed in accordance with the present invention; Fig. 2 is a similar view in rear elevation; with a portion,of the machine removec.; Fig. 3 is a view in side elevation of the machine; looking from right to left in Fig. l; Fig. 4 is an enlarged view partially in section and partially in elevation; of a portion of the feeding mechanisms of the machine; Fig. 5 is a view in perspective of a portion of the main feeding mechanism; Fig. 6 is an enlarged plan view of a portion of said main feeding mechanism; Fig. 7 is a view in front elevation of a portion of said main feeding mechanism; Fig. 8 is an enlarged plan view of a portion of the left-hand end of the machine; showing particularly the left detector mechanism for detecting the angularity of a sheet fed to the cutting instrumentalities; said mechanism being illustrated in an intermediate position; Fig. 9 is a view in front elevation of the mechanism shown in Fig. 8; Fig. 10 is a perspective view of said detector mechanism; looking from the rear of the machine; Fig. 11 is a plan view of a portion of the right-hand end of the machine; with a portion of the machine removed; and showing particularly the right detector mechanism fpr detecting the angularity of a sheet fed to the cutting instrumentalities; and also a part of the tripping mechanism; the detecting mechanism being illustrated in an intermediate position; Fig. 12 iS-a view; partially in section and partially in side elevation; of the mechanisms shown in Fig. 11; Fig. 13 is a view in front elevation of said mechanisms; nig. lll is a view; partially in section and partially in side elevation; taken on the section line 141-14 of Fig. 13; Fig. 15 is a perspective view of a portion of the tripping mechanism for the main driving clutch of the machine; said mechanism being illustrated in its released position; Fig. 16 is an enlarged view in front elevation of the right-hand end of the machine; showing particularly the automatic mechanism for adjusting the machine to cut successive like series of strips of graded widths; a portion of the machine being shown in section for the sake of, clearness; Fig. 17 is an enlarged view; partially in side elevation and partially in section; on the line 17-17 of Fig. 1; showing certain of the main operating cams and cooperating levers; Fig. 18 is a view in side elevation looking from right to left in Fig. 1; and showino1 particularly the automatic adjusting mechanism; Fig. 19 is a plan view; partially in section; of the mechanism shown in Figs. 16 and 18; a portion thereof being removed for the sake of clearness; Fig. 2() is a view; partially in section and partially in side elevation; on the line 20-20 of Fig. 21; and showing the transferring rocker in its raised position and delivering a strip to the receiving table; Fig. 21 is a View in rear elevation of the transferring rocker in its raised position and showing the mechanism for adjusting the positions of the end stops or gages; the detecting mechanisms being illustrated in their retracted positions; and Fig. 22 is a view in reduced scale; partially in side elevation and partially in section; showing the connections for adjusting the positions of the feelers.

Referring to the drawings; the stock cutting machine shown comprises the following main parts which; with t-he exception of the main feeding mechanism; are substantially similar to the corresponding elements of the prior machine; and which include a stationary cutting bed for supporting the stock during the cutting operation; a reciprocable cutting knife 32 for cooperating therewith to sever strips of the desired width from the sheet of material operated upon; a main feeding mechanism embodying a plurality of feed dogs 34 for engaging the stock at a. plurality of points and feeding it step-bystep to the cutting instrumentalities; a plu. rality of end stops 36 for determining the width of the strip to be cut and against which the stock is fed; a plurality of supplemental. feed devices or pushers 38 which are automatically thrown into operation tol engage the rear edge of the stock and eii'ect its actuation after the stock has become reduced in length to such an extent that the main feeding mechanism is unable to advance it; a pivotally mounted discharge table l0 disposed adjacent the cutting bed and on the advance side thereof for discharging the remnant end of a sheet of stock; a plurality of feelers 4t2 disposed on the advance side of the cutting instrumentalities and adapted to periodically feel of the stock to determine whether or not it is of suflicient width to enable a full sized strip to be cut therefrom and for controlling the operation of the machine in accordance therewith; a supply table 44 disposed at the rear of the machine for supporting and progressively raising a stack of sheets of material; a plurality of supply dogs i6 rendered operative upon the exhaustion of a piece of stock being operate-d vupon to engage and advance the uppermost sheet on the supply table into the region of4 operation of the main feeding mechanism; a receiving table 48 disposed at the front of the machine and beyond and above the cutting instrumentalities for receiving the successive cut strips in stacked relation; a transferring rocker 50 normally disposed in a horizontal plane for supporting the successive strips as they are cut and which is periodically rocked or rotated upwardly into a vertical position to transfer said strips successively and deliver them to the receiving table; an edge guide 52 normally resting upon the upper ends of the accomplishing end stops 36 for guiding the `forward edge of the sheet ofstoclr into engagement therewith; and mechanism interconnecting the several end stops and feelers with the receiving table in such manner that said table, end stops and feelers may be concurrently and proportionately adjusted in adjusting or setting the machine to cut strips of different widths. i

The machine also comprises the followingl new parts7 which have been incorporated into the earlier machine for the purpose of the results hereinbefore stated, .and which include an automatic adjusting mechanism embodying a travelling carriage 56, a ratchet 'and a plurality of operating pawls 60 and 62 for the purpose of. automatically and progressively adjusting the `height of the .receiving table 48 and consequently of the connected end stops' 36 and feelers 4t2 after each cutting operation in order to vary the width of the next succeeding strip cut, and to produce a series of strips of predetermined graduated widths; a detecting mechanism embodying a plurality of detectors Gil and 66 positioned slightly in advancev of the outermost end stops to be engaged by the forward edge of the stock it is fed in order to determine whether the forward edge of the stock is in parallelism with the cutting knife or whether there exists an angularlity between them; a tripping mechanism including a release plunger 68 for automatically releasing the main clutch of the machine and thereby disconnecting it from the source of power whenever said detectors determine an existing angularity; and a detector retracting mechanismembodying an` actuating rod 70 for temporarily retracting the detectors from engagement with the forward end of the stock and thereby preventing any possible baclr throw or rebound thereof prior to the cutting operation.

i Inasmuch as the component elements, with the exception of the main feeding mechanism, of the main body of the machine correspond substantially to similar parts of the prior vmachine and form noA direct `part of the present inventiomeicept they perform certain ynecessary functions in the operation of the machine as a whole, only a brief and general description of these common features of the machineI will be given, reference being had to the copending `application, above referred to7 for a full and detailed description thereof if desired. The main feeding mechanism, however, of the present invention is a modification and iinprovement of the feeding` mechanism of the earlier machine `and therefore will' be fully described. Y v i Referring to the drawings, the sheet vmaterial orsto'clr is cut by means of the co-operative action yof the stationary cutting bed 30 andreciprocating ciittiiw vi knife is mounted on a horizontal f. beam. 72 (Figs. 192,3 and 20) which is g c at its ends by the side frames 74 and the machine in a well-known manner, and which is reciprocated by means of rods 7 8 that connect its ends with cranl-z pins 8G that are associated with crank disks 82 on the ends of a main cam shaft Sfr of the machine. This cam shaft is provided with gears 3G which mesh with pinions 8S on a main power shaft to whichv a pulley 92 issecured, by means of which the machine may be connected with any suitable source of power. The pulley 92 connected with the power shaft by means of a. clutch (not shown) of `any ordinary or suitable form, thus clutch being controlled by a handlever 94k (Figs. 2 and l5) so that the machine may be conveniently started and stopped.

in the path of ythe reciprocating cutting ltnire and is relativelynarrowinwidth to permit the waste or remnant pieces at the forwad and rear ends of the sheet of stock to be discharged downwardly on either side thereof either by gravity or by means provided for the purpose. 4

rlhe sheet of stock is fed horizontally between the cooperating cutting instrumentalities, and the width of the strip which severed is determined by the engagement of .its forward edge with `the. end. stops 3G. luring the feeding movement, the stock is supported (Fig. 4t) partly upon a stationair).y horizontal table 96 and partly upon the discharge table i0 which normally forms a horizontal extension thereof, and which is pivoted to the latter on a transverse rod 98 so that it may be swung downwardly at proper times to discharge the waste rear end of the sheet.

rThe mechanism for feeding the sheets of stock,` although performing a function similar to that of the corresponding mechanism in the prior machine, differs somewhat in construction and mode of operation and therefore it will be described in detail. This feed mechanism comprises a plurality of spaced and toothed feed dogs-34C (Figs. 4,'

6 and 7) that are pivotally mounted at the inner ends of a plurality of forwardly extending' arms .100 4that constitute integral parts of a cross-beam 102, the ends of which provided with lugs 104.- by means of which it is pivotally connected to proj cting;` lugs 106' extending inwardly from a plurality of slides 108 that are adapted to travel in a horizontal plane in guideways 110 constituting a part of the side frames of the machine. The respective endmost feeddogs vSil are. spaced inwardly from the slides a material distance in order to avoid engagement with the ragged edges of the iso

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