US1814111A - Splitting machine - Google Patents

Description

July 14, 1931.

W. C. BAXTER SPLITTING MACHINE Filed July 15, 1929 NN MN Patented July 14, 1931 provide UNITED STATES P NT mm wr-Lnrm c. naxrna, or BEVERLY, massncnusn'rrs, assreuon r0 Um'rnn snor. MACHINERY conrom'rrou, or rarnajsomunw a; oqnronarrou or ew JERSEY,

TuI MAQHINE Application filed July 13,

i This invention relates to splitting machines and is herein illustrated as embodied V in a machine for splitting upper leather for use in the manufacture. of boots and shoes a Machines for splitting-upper leather commonly comprise a knife and a pair of feed rolls, one. of which is composed of independently yieldable sections: while the other is a rigid roll. The. sectional roll is usually the lofwerbne, and the sections are each supported by springs so that, during the sp itting operatiomthe leather will be prop,-

erly held up against the upper roll and fed to the knife irrespective of variations in tions of the sectional roll should yield comjparatively easily but that with a thick, stiff piece the sections should yield much' less easily. In other words, the sections shoul I each exert more force upon a thick. stifi' piece of leather than upon a thin flexible In order to permit a machlnc of the, type referred to to be. still better adapted to opcrate u on either kind of work, there. is in accordance with one feature of theinvention a sectional member for as sisting in feeding the work to the knife,

yielding supporting members for the sections constructed and arranged to cause the sections to press with a given force upon the I work, and separate means for supplementing the action of the supporting members to cause the sections to press with greater force upon the work. In the illustrated machine the sections of a sectional feed roll are mounted independently each in a yoke which is supported by a coiled spring; and a plurality of leaf springs are provided which may be caused simultaneously to contact with the bottoms of the. stems of the yokes, whendesired. Normally the leaf'springs are inoperative, so that the machine is adapted In to operate upon light, flexible leather; and,

1829. Serial No. 37 8,149,

when it is desired to operatev upon thick,

stiff leather, therleaf springs are caused-to supplement the action of the coiled springs so that-the, leatheris held up firmly against the upper roll and theleather is reduced by the splitting knife to a uniform thickness throughout.

This and other features of thei-nvention including certain details OfiCOIlStI'llCtl'OIl and combinations of parts wi'll be described as embodied in an illustrated machine and pointed out in the appended claims.

Referringnow to the accompanying draw 1ngs: I

Fig. 1 is a rear elevation of a portion of a machine in which the present invention is embodied and,

Fig. 2 is a vertical cross section of a portion of the machine. i

The machine in many respect-sis like-the machine shown in Patent No; 1,382,755, granted June 28, 1921 upon anapplication filed in my name; and'before the new construction is described in detail, the old construction will be briefly outlined. The machine comprises a belt knife 3, an upper roll '5 of rigid construction and a lower roll made up of independently movable sections 7 mounted upon a rotary shaft 9. The sections 7 and'the shaft 9 are shaped as shown so, that the sections aredriven from the shaft but may move up and down. The sections are guided between two vertical members 11 and 13 having respectively a hardened plate I 15 and a hardened bar 16 arranged to contact with opposite localities on each section, said vertical members'being fast to'a heavy bar 17 This bar has a channel, as shown, having holes through its bottom in which are verticallyv slidable a plurality of stems 19 of yokes 21 in each of which is rotatably mounted a supporting roll 23, one to each section 7 of the lower feed roll. The yokes are rectangular in cross section so as to have a sliding "fit in the channel in the bar 17 and are each urged'upw-ardly by a coiled spring 25, the extent of upward movement of each yoke being limited by a nut 2? threaded on the stem 19 and held in adjusted position by a lock nut 29. In the machine of the patent the two nuts just described are not present; and no means is provided for adjusting the height to which the supporting rolls 23 may rise. The bar 17 in which the series of supporting rolls are thus mounted is supported by heavy springs, one of which is shown at 30 contained in hollow posts, one of which is shown at 31. are two of these posts, one at each end of the bar 17, which are adjustable vertically by mechanism not shown, to raise and lower the sectional roll. The machine as described above, except as noted, is or may be like the machine of the patent to which reference is made for further details of construction.

It is desirable, for example when stiff, heavy work is being operated upon, to provide means for increasing the force necessary to depress the sections 7 so that such heavy work will be held up firmly against the upper roll irrespective of variations in the thickness of the work at different 10- calities thereof. To this end a series of leaf springs 33 are provided which may be moved into and held in the positions shown, when desired, so as to supplement the action of the coiled springs 25. When the leaf springs are in position to supplement the action of the springs 25, as shown, the free end of each leaf spring is exerting an upward pressure upon the bottom of one of the stems 19 of the yokes 21 of a supporting roll 23, there being as many leaf springs as there are stems. At the end remote from its free end (the right-hand end in Fig. 2) each leaf spring is fastened by screws 35 to a carrier bar 37 having two perforated lugs 39, 41 which are received respectively between a pair of stationary perforated lugs 43, 43 and a second pair of stationary perforated lugs 45, 45. A hinge pin 47 extends through the pair of lugs 43 and lugs 39, and a second hinge pin 49 extends through the pair of lugs 45 and lug 41, the carrier bar 37 thus being angularly movable about the alined axes of theseipins. The two pairs of spaced lugs 43, 45 are integral with a long bracket 51 which is fastened to the frame of the machine'by four cap screws 53. Near its opposite ends the bracket 51 has pins 55 which are connected respectively by tension springs 57 to pins 59 driven'into the carrier bar 37. These tension springs tend at all times to swing the carrier bar 37 in a counterclockwise direction, as viewed in Fig. 2, so as to withdraw the leaf springs 33 from contact with the bottoms of the stems 19 of the yokes of the supporting rolls 23. In order to swing the carrier bar 37 in a clockwise direction into the position shown so as to swing the leaf springs 33 into operative position, a thumb screw 61 has its upwardly extending stem threaded through a lug on the stationary-bracket 51, the head of the screw contact- There ing with a flat-topped projection 63 on the carrier bar 37.

Normally the adjusting screw 61 is threaded up into the lug on the stationary bracket 51 so that the tension springs 57 swing the carrier bar 37 sufficiently to withdraw the leaf springs 33 from contact with bottoms of the stems 19 of the yokes. With this position of parts the machine is adapted to operate upon thin, flexible leather. When it is desired to operate upon thick, stifl' leather, the thumb screw 61 is screwed down until'the parts occupy the positions shown. It is thus possible to adjust the machine quickly so as to put it into condition to operate upon either flexible or stiff leather.

Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

Having described the invention, what I claim as new and desire to secure byLetters Patent of the United States is 1. A machine of the class described having, in combination, a knife, means including a sectional member for feeding the work to the knife, yielding supporting members for the sections arranged to cause the sections to press with a given force upon the work, and separate means for supplementing the individual action of the supporting members to cause the sections to press with greater force upon the work.

2. A machine of the class described having, in combination, a knife, means including a sectional member for feeding the work to the knife, yielding supporting members for the sections arrangedto cause the sections to press with a given'force upon the work, and separate means for simultaneously supplementing the individual action of the supporting members to cause the sections to press with greater force upon the work;

3. A.machine of the class described having, in combination, aknife, a member comprising independently yieldable sections for feeding the work to the knifeymeans including a spring for supporting each section whereby a given force applied to a section causes it to yield, and separate means for supplementing the action of all the springs to prevent each section from yielding except upon application to it of a greater force.

4;. A machine of the class described'having, in combination, aknife, a member comprising independently yieldable sections for feeding the work to the knife, means includyielding except upon application to it of a greater force.

5. A machine of the class described having, in combination, a knife, a feed member having independently yieldable sections, a support for each section, springs for sustaining the supports, and additional spring means adapted to be moved into and out of operative relation to the supports to supplement the individual action of the first-named springs.

6. A machine of the class described having, in combination, a knife, a feed member having independently yieldable sections, a support for each section, a spring for sustaining each support, and a plurality of addi-' tional springs adapted to be moved into operative relation, one to each support, to supplement the action of the first-named springs.

7. A machine of the class described having, in combination, a knife, a feed member having independently yieldable sections, a support for each section, a spring for sustaining each support, and a plurality of additional springs adapted to be moved simultaneously into operative relation, one to each support, to supplement the action of the firstnamed springs.

8. A machine of the class described havs ing, in combination, a knife, a feed member havin independently yieldable sections,'a plurahty of springs, one for supporting each section, and resilient means for supplementing the action of the springs.

I 9. A machine of the class described having, in combination, a knife, means including a. sectional feed roll for advancing the work to the knife, supporting rollers for the sections of the feed roll, yokes in which the rollers are mounted, springs for sustaining the yokes, and resilient means adapted to be moved into supporting relation to the yokes to supplement the action of the springs.

10. A machine of the class described having, in combination, a knife, means including a sectional feed roll for advancing the work to the knife, supporting rollers for the sections of the feed roll, yokes in which the rollers are mounted, springs for sustaining the yokes, and resilient means, one for each yoke, adapted to be moved into su porting relation to the yokes to supplement t e action of the springs.

11. A machine of the class described having, in combination, a knife, a rigid roll, a sectional member comprising independently movable sections for pressing the work In testimony whereof I have signed my 7 name to this specification.

' WILLIAM C. BAXTER.

against the rigid roll and for cooperating V with said roll in feeding the work to the knife, yielding supporting members for the sections, and separate means for supplementing the action of the supporting members to cause the sections to press the work with eater force against the rigid roll. 12. A machine of the class described hav-

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