US2578346A

US2578346A - Mechanism for cutting sheet material

Info

Publication number: US2578346A
Application number: US49528A
Authority: US
Inventors: Berkeley J Florian; Florian Rodriguez Steuart
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-09-16
Filing date: 1948-09-16
Publication date: 1951-12-11
Anticipated expiration: 1968-12-11

Description

Dec. 11, 1951 B. J. FLORlAN ETAL MECHANISM FOR CUTTING SHEET MATERIAL Filed Sept. 16, 1948 J-Z-"lf'tZtl'lvittkii iti 32 |NVENTORS= BERKELEY JQFLORIANFQ R.STEUART FLORIAN.

Patented Dec. 11, 1951 MECHANISM FOR CUTTING SHEET MATERIAL Berkeley J. Florian, Plantsville, and Rodriguez Steuart Florian, Southington, Conn.

Application September 16, 1948, Serial No. 49,528

5 Claims.

This invention relates to mechanism for cut ting sheet material and particularly to a handoperated pinking instrument resembling scissors for operating upon cloth, leather or other sheet material.

It is an object of this invention to provide mechanism for expeditiously and accurately cutting cloth and other sheet material and particularly to provide an improved pinking instrument or scissors of the class shown and described in my Letters Patent of the United States No. 2,174,222 granted September 26, 1939, to Berkeley J. Florian.

To these ends we have provided certain improvements in mechanisms of the class described, particularly pinking instruments of the type just referred to, as set forth in the following description, the several novel features of the invention being separately pointed out and defined in the claims at the close of said description.

In the accompanying drawings:

Figure 1 is a side elevation, partly broken away and partly in section, of a pinking instrument constructed in accordance with this invention.

Figure 2 is a section on line 2-2 of Fig. 1.

Figure 3 is a plan view of a piece of flexible sheet material W after it has been operated upon by the pinking instrument shown in Fig. 1.

Figure 4 is a vertical longitudinal sectional view of the forward end portion of the instrument shown in Figure 1.

Figure 5 is an enlarged sectional detail on line 5-5 of Figure 6 relating to the cutting disk hereinafter described and its actuating clutch.

Figure 6 is an axial sectional detail of the cutting disk unit hereinafter described and its pinion.

The illustrated embodiment of the invention is a pinking instrument comprising two members l and H which are pivotally connected intermediate their extremities by means.of a pintle l2 whose opposite end portions are forcibly fitted within holes provided in the lower member ||l, said member being a lever and loosely mounted upon the intermediate portion of said pintle l2 so that it can be vibrated thereon relatively to the lever member ID.

Lever member I0 is made at its rear end with a finger-hole I3 so as to provide a push-and-pull grip for the fingers of the hand of the operator;

while the rear end of the lever member II is made with a hole M to receive the thumb of said hand.

The forward end of lower member H3 is provided with an upper jaw l and a lower jaw It, said twojaws being separated by a slot I! which is open at the forward end of said member as shown. Jaw I 5 is slotted verticallyto provide the same with spaced-apart relatively parallel side walls l8 (Fig. 2) to receive between them the forward end portion of the upper lever memher H, said forward end portion being formed at its extremity with a gear segment l9 that is in mesh with an interiorly cylindrical pinion annulus 2o rotatably supported by the tubular hub 2| (Figs. 5 and 6) of a cutting disk or wheel 22 and several small cylindrical clutch rollers 24. The cutting disk 22 is made from hardened sheet steel and its hub 2| is rotatably mounted upon the intermediate portion of a pintle 26 whose opposite ends are forcibly fitted into holes provided through the side walls l8. The hub 2| is made upon its exterior with three longitudinal angular pockets 26 within each of which one of the rollers 24 is arranged, one side Wall of each of said pockets being flat and tangentially disposed relatively to the axis of hub 2| as is usual in this type of clutch.

It will therefore be clear that when gear 29 is rotated in the direction of the arrow a in Fig ure 5 by movement of segment l9 in one direction it will act through the rollers 24 and hub 2| to rotate cutting disk 22 in the direction of the arrow 11 of Fig. 1 and arrow 2) of-Figs. 1, 4 and 5, and that when segment I9 is swung in the opposite direction the cutting disk 22 and its hub 2| will remain at rest on pintle 26 so long as a cylindrical hardened steel anvil roll 28 is held against the periphery of said cutting disk.

This anvil roll 28 is disposed within a vertical slot provided through the forward end portion of the lower jaw l6 and is rotatably mounted upon the intermediate portion of a pintle 29 whose opposite end portions are forcibly fitted within holes formed through the oppositely disposed

side walls

36 and 31, (Fig. 2), bordering said vertical slot as shown in Fig. 2.

The inner or rear portion of the lower jaw I6 is preferably integrally connected with the proximate portion of the lower member ID by a narrow isthmus 29 so that minute displacement of the free end of jaw l5 toward and from law I5 is possible under the influence of a manually adjustable screw 30 by which the anvil roll is normally held against the periphery of the cutting disk 22. The shank of screw 30 loosely occupies a hole formed through the jaw It with its inner threaded end portion occupying a threaded hole 3| formed in lower member ID. At its outer end the screw 30 is provided with a circular knurled head 32 by means of which it is manu all operated.

Rotary movement of the cutting disk 22 in the direction of the arrow b of Fig. 4 is limited by the engagement of lever member I! with lower member ID as shown in Fig. 4, while swinging movement of lever member away from member I0 is limited by the engagement of segment l9 with a stop shoulder 33 (Fig. 4) provided upon lower member l0. 7

As shown in Figs. 5 and 6 the hub 2| of cutting disk 22 is a tubular element having an exteriorly threaded end portion 34 of reduced diameter occupying an aperture provided at the center of cutting disk 22, the latter being fixedly clamped in position against an annular shoulder provided upon hub 2| bymeans of a nut 35 mounted upon said threaded end portion of the hub.

As shown in Figs. 1, 2 and 4, the oppositely disposed side walls 33 and 3'! of the vertical slot provided in jaw l6 extend forwardly beyond anvil roll 28 a substantial distance and are pointed at their ends as shown at 38 thereby to provide pick-up fingers for use in directing the lower jaw is under the marginal portion of a piece of sheet material to be cut while the latter rests fiatwise upon the flat top of a table or the like, said fingers also serving to guide said marginal portion into the entrance bight between cutting disk 22 and anvil roll 28.

The crotch of jaw 16, at the inner end of the vertical slot of the latter, is formed with a cylindrical pocket 39 within which is mounted a cylindrical body of felt 40 that is yieldingly urged toward and against the periphery of anvil roll 28 by a coiled spring 4| mounted within said pocket. This body of felt serves as a wiper to clean the anvil roll of lint and fibers which sometimes accumulate thereon while operatin upon certain types of sheet material.

When the edge of the sheet material is introduced into the bight between cutter disk 22 and anvil roll 28 and the operator forces the handle ends of lever members Iii and ii together, the cutting disk 22 is rotated in the direction I), and the sheet material is fed between the anvil and the cutter by the latter and since the anvil roll is held against, movement away from the cutter by the thumb screw 30 during this operation the sheet material W, Figs. 1 and 3, is slitted by the cutter as at 42. 7

When the invention is embodied in a pinking mechanism as shown the outer marginal portion of the cutting disk is crimped so that the cutting edge thereof is sinuous as shown in Fig. 2, with the result that the instrument performs a pinking operation upon the sheet material; that is, it forms a sinuous slit bordered by scallops or angles as shown at 42 in Fig. 3.

As shown in Fig. 6 the opposite sides of the marginal portions of the cutting disk may be beveled to provide the same with a sharp cutting edge.

When the sheet material that is being cut rests upon a table or the like and the pinker instrument is slid forwardly while resting upon said table or the like, the oppositely disposed side walls 36 and 3'5 of jaw l6 act as runners which slide upon the top of the table or the like, the lower edges of said oppositely disposed side walls being of arcuate shape as shown and extending slightly below the periphery of the anvil roll 28 so as to maintain the latter out of contact with the table top or the like as the cutting operation progresses.

It is not essential that the inner end of the lower jaw [6 be integral with upper jaw so long as said end is supported by the latter and the pressure of roll 28 against cutter 22 is controlled by the screw 30.

What is claimed is:

l. A mechanism for cutting sheet material comprising an upper thumb-operated lever member provided at its forward end with a gear segment and a lower member provided at its forward end with 'a'longitudinal slot extending from side to side thereof and open at one end for the reception of the material to be cut and defining at saidforwardend with upper and lower jaws; a cutting disk rotatably mounted upon said upper jaw adjacent to the forward end thereof and provided with a hub; a rotatable pinion annulus surrounding said hub and meshing with said segment; a cylindrical anvil r011 rotatably supported by said lower jaw adjacent to the forward end thereof with its peripheral surface in contact with the periphery of said cutting disk; oneway clutch mechanism between and co-operating with said pinion annulus and said hub through which said annulus acts when oscillated by said segment to rotate said hub and disk in one direction only thereby to cause the latter to feed the material between said roll and disk and simultaneously to cause said disk to slit said material; an aperture formed perpendicularly through the intermediate portion of said lower roll-carrying jaw; an adjustable member occupying said aperture for holding said anvil roll and lower jaw in co-operative relationship with said disk, said member having an inner threaded Portion occupying a threaded socket formed in said upper jaw and being rotatably adjustable to vary the pressure of said roll against said disk.

2. A mechanism for cutting sheet material according to claim 1 and wherein said anvil roll is mounted within a vertical slot provided through the forward end portion of said lower jaw and wherein the opposite side walls bordering said slot extend forwardly beyond said anvil roll and are pointed for use in picking up the fabric to be cut.

3. A mechanism for cutting sheet material ac- :cording to claim 1 and wherein said anvil roll is mounted within a vertical slot provided through the forward end portion of said lower jaw and wherein the opposite side walls bordering said slot extend below the periphery of said anvil roll to shield the latter against contact with the support for the sheet material during the cutting operation of the mechanism.

4. A mechanism for cutting sheet material according to claim 1 and wherein said anvil roll is mounted within a vertical slot provided in the forward end portion of said lower jaw; wherein a pocket is formed in said lower jaw rearwardly of the anvil roll; wherein a fibrous wiper element is mounted within said pocket, and wherein a spring is provided within said pocket for yieldingly holding said Wiper element against the periphery of said anvil roll to cause said element to clean lint from said roll.

5. A mechanism for cutting sheet material according to claim 1 and wherein the rear end of said lower jaw is integrally connected with said upper jaw by a narrow isthmus disposed at the rear end of said first-mentioned longitudinal slot and wherein said last-mentioned adjustable member is disposed between said isthmus and said anvil roll for holding the latter in position against said cuttin disk.

BERKELEY J. FLORIAN. R. STEUART FLORIAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Num er Name Date 1,488,832 Rauth Apr. 1, 1924 2,097,385 Spielman Oct. 26, 1937 2,174,222 Florian Sept. 26, 1939