US451685A - Roll-paper holder and cutter - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

M. S.'TRAOY ROLL PAPER HOLDER AND CUTTER.

No. 451,685. Patented May 5, 1891.

I H IH 1 h H H H HH UNITED STATES PATENT OEEICE.

MILTON S. TRACY, OF ROCKY HILL, CONNECTICUT, ASSIGNOR TO FREDERICK WV. DROSTEN, OF ST. LOUIS, MISSOURI.

ROLL-PAPER HOLDER AND CUTTER.

SPECIFICATION forming part of Letters Patent No. 451,685, dated May 5, 1891.

Application filed May 23, 1890. Serial No. 352,830. (No model.)

To all whom it may concern: or gudgeons cl, which are journaled in bear- Be it known that I, MILTON S. TRACY, of ings formedby the ends of the inclined slots Rocky Hill, in the county of Hartford and f, formed in the end pieces a, said slots being State of Connecticut, have invented certain open at their outer ends to permit the intro- 55 new and useful Improvements in Paper-Cutduction and removal of the gudgeons.

ters, of which the following is a specification. 9 represents the paper-cutting knife, which This invention relates to paper-cutters in is provided at its ends with ears or lugs g, which a roll of paper is held 011 a roller or which are oblique or diagonal to the body of mandrel the ends of which are journaled in the blade, and are formed to slide in inclined 6o bearings in a supporting-frame, and in which slots it, formed in the end pieces a. When a gravitating knife is employed which is the ears or lugs g are in place in said slots, guided by inclined slots formed in the sup the under side of the blade rests upon .the porting-frame, the arrangement being such periphery of the paper roll 6, the blade being that the edge of the knife rests upon the peadapted to rise and fall by means of the said I5 riphery of the roll of paper and accommolugs and slots, so that when a new roll is put dates itself automatically to the decreasing into the frame the blade may be raised so as size of the rollas the latter becomes reduced, to bear on the enlarged periphery of said the knife being adapted to sever the paper roll, and as the roll becomes reduced by the when the free end of the latter is pulled diremoval of the paper the blade will fall auto- 2o agonally against the edge of the knife. An matically and remain in contact with the peexample of a cutter of this class, above reriphery of the roll until all the paper has been ferred to, is shown in Letters Patent granted removed. It is important that the cuttingto F. W. Drosten June 21, 1887, No. 3653341. edge of the blade be in close contact with The present invention has for its object to the periphery of the roll, so that the paper 25 provide certain improvements in cutters of may be severed satisfactorily by pulling outthis class, whereby the automatic conformawardly and upwardly on the free end of the tion of the knife to the periphery of the roll Web. may be made more perfect and the binding of It often happens that the periphery of the the knife in its guiding-slots prevented. paper roll is eccentric to its axis of rotation, 0 To these ends the invention consists in the so that as the roll rotates the knife is at times improvements which I will now proceed to required to move upwardly in conforming to describe and claim. the eccentricity of the roll. It will be seen In the accompanying drawings, forming a that the bearing of the knife against the roll part of this specification, Figure 1 represents only at or near the cutting-edge or outer end 3 5 an end elevation of a paper-cutter embodyof the knife causes the upward pressure exing my invention. Fig. 2 represents a rear erted against the knife by the roll to tip the elevation of the same. Fig. 3 represents a knife crosswise, and thus cause the ears or perspective view of a portion of my gravitatlugs at the ends of the knife to bind on the ing knife. Figs. 4 and 5 represent a modifiedges of the guiding-slots 71, the portion of 0 4o cation. the knife between the cutting-edge and the The same letters of reference indicate the back acting as a lever. This difiiculty has in same parts in all the figures. many cases been so great as to prevent the In the drawings, a a represent the end rotation of the roll when the eccentricity of pieces of the supporting-frame, said pieces the latter is somewhat marked. To obviate 5. 45 being rigidly connected by any suitable this difficulty, I provide lugs or projections t meansas, for example, by base I) and a top 2' on the under surface of the knife at the piece 0, to which said end pieces a a are back or rear edge thereof, said projections bescrewed. ing formed to bear upon the periphery of the d represents the roller or mandrel on which roll e, as shown in Fig. 1, so that the knife is mo 50 the web of paper is wound in the form of the supported by the roll not only at its cuttingroll 6. Said roller is provided with trunnions edge, but also at its back or inner edge. Said projections are arranged substantially in line with the ears g y at the ends of the blade. Hence the upward pressure of the roll when its periphery is eccentric is exerted on the knife at both edges alike and in the direction of the movement of the ears g g in their guiding-slots. There is, therefore, no possibility of the knife being tipped and the ears or lugs 9 being caused to bind on the sides of the slots h by such upward pressure.

To insure close contact between the cuttingedge of the blade and the periphery of the roll, I give the under side of the blade the bevel or inclination from the point 2, which is back of the cutting'edge to the point 3, which is at the cutting-edge. The same result might be produced by giving the under side of the blade a slight concavity from its cutting-edge to its back or upper portion, the object being to enable the under side of the blade to conform approximately to the periphery of the roll, so that the close contactof the cutting-edge with the periphery of the roll will be insured.

Itis obvious that the knife may have but one lug i instead of two, and said lug may be at the central part of the knife or may extend along the greater portion of the length of the knife; or, if preferred, there may be more than two lugs.

I do not limit myself to the employment of the cars g and slots 7L as the means for guiding the knife, but may use the knive having the lug or lugs i in connection with means for guiding the knife, such as are shown in Figs. t and 5, the knife being provided with groove or slot 7 in each end to receive guiding tongues or ribs formed on the supportingframe. In any case, however, the means for guiding the knife should be such as to permit only a substantially equal motion of both edges of the knife, and not a tipping motion or an upward swinging of the cutting-edge independently, so that when the paper is pulled outwardly against the cutting-edge in,

the operation of cutting the paper, the entire weight of the knife and the friction due to the contact of the ears 5 with the sides of the slots or to the contact of the sides of the grooves shown in Figs. l and 5, with the said guiding tongues or ribs, wil be utilized in supporting the cutting-edge againstthc strain or pull exerted on it by the paper.

I claim- 1. In a paper-cutter, the supporting-frame provided with means for supporting a roll of paper and with knife-guiding slots, combined with a knife having ears adapted to slide in said slots, said knife being formed to bearon the roll not only at its forward or cutting edge but also at its rear portion, whereby binding of the said ears on the sides of the slots during the upward movement of the knife by the roll of paper is prevented, as set forth.

:2. In a paper-cutter, the supporting-frame provided with means for supporting a roll of paper, combined with a knife guided by said frame, and a lug or projection on its under side adapted to bear on the periphery of the paper roll, as set forth.

In a paper-cutter, the combination, with the supporting-frame. adapted to support a roll of paper and provided with knife-guiding slots, of a knife having ears adapted to slide in said slots and formed on its under side to approximately conform to the periphery of the paper roll, whereby its cutting-edge is kept in contact with said periphery, as set forth.

4. In apaper-cutter, the combination of the supporti11g-frame provided with means for supporting a roll of paper, and a knife guided on said frame by elongated projections or bearing-surfaces at the rear edge of the knife and corresponding bearingsurfaces on the frame, whereby a tipping movement of the knife is prevented, said knife being provided with a lug or projection on its under side, arranged substantially in line with the portions of the ends of the knife that are engaged with and slide on the frame and adapted to bear on the periphery of the paper roll, as set forth.

5. In a paper-cutter, the supportiug-frame provided with means for supporting a roll of paper and with knife-guiding slots, combined with a knife formed to bear on the periphery of the roll both at its cutting-edge and at its back or rear edge and provided at its ends with elongated ears arranged substantially in line with the rear edge-bearing portion of the knife, the contact of the rear edge of the knife with the paper preventing the binding of the said ears on the sides of the slots during upward movement of the knife by the roll of paper, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses this 21st day of May, A. D. 18210.

MILTON S. 'lRAGY.

Witnesses:

ARTHUR W. Unossnnv, A. T). HARRISON.

IIC

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