US851413A - Paper-cutter. - Google Patents

Description

PATENTED APR. 23, 1907.

W. H. GOLDING. PAPER CUTTER.

' APPLICATION FILED mm: 11.1906.

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?ATENTED APR. 23, 1907.

W. H. GOLDING.

PAPER CUTTER.

APPLICATION FILED JUNE 11.1906.

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William HGoZding} No. 851,413.- PATBNTED APR. 23. 1907.

W. H. GOLDING. I PAPER CUTTER.

APPLICATION I'I-LED mm: 11,1906.

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M 1 M l. m w mww 8 Gm QH mN Mn 4 m m 3 K W mm i w i @w w kw A. Nh mm mm. Q N mm \g E E S g 4% Q {m aw m mg WILLIAM H. GOLDING, OF FRANKLIN, MASSACHUSETTS.

PAPER-CUTTER.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed June 11, 1906. Serial No. 321,104.

To all whom it 71mg; concern.-

Be it known that 1, WILLIAM H. GOLDING, a citizen of the United States, and a resident of Franklin, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Paper- Cutters, of which the following is a full, clear, and exact description.

The object of this invention is the construction of a power-operated, self-clamping paper cutter wherein the clamping pressure shall automatically increase with the thickness or resistance of the material being cut; and which shall embrace numerous other improvements hereinafter set forth.

Referring to the drawings forming part of this specification, Figure 1 is a front elevation of a paper cutter embodying my improvements. Fig. 2 is a plan view of the same. Fig. 3 is a sectional detail elevation showing my device for positioning the material without lowering the clamp or the blade. Fig. 4 is a cross section on the line XX in Fig. 1. Fig. 5 is a cross section on the line YY in Fig. 1. Fig. 6 is a face view of a portion of the main gear wheel.

The reference numeral 1 designates the table of the paper cutter; 10 the cutter blade, and 30 the clamp. The blade is secured by suitable bolts or screws 1.2 to the blade-can rier 11, the latter being held back against, and moved in close contact with, the ways 40, 40 by means of the following arrangement the purpose being to do away with the necessity for guide ways at both front and rear of the blade. Strongly pivoted to the Way 40 at 19 is the swinging arm 18 whose free end is provided with a pin or bolt 17 reaching forward through the slot 14 in the blade-carrier into engagement with the block 16. Said block slides horizontally along the ways 13 above and below said slot, and is secured to, or made integral with, the connecting rod 15 whose opposite end is provided with a similar block 16 slidable along similar ways 13. From this latter block extends a bolt 17 through a slot 14 to the bell-crank lever 20, which is strongly pivoted to the ways 40 at 21. Said ways being slightly farther forward of said arms so that the latter are out of contact with the carrier 1 1, and the carrier being kept pressed back against the ways by means of the bolts 17, 17 and the check-nuts 17 thereon, there is no necessity for guide ways in front of the blade carrier. This simplifies the construction of the machine, removing parts which would otherwise be in the way; and greatly simplifies the adjustment required to take up wear; all that is now needed being to turn the check nuts 17 slightly.

A pitman rod 23 pivoted at 22 to the bellcrank lever and joined to the crank-pin 24 of the gear wheel 25, serves to swing both the bell-crank lever and the arm 18 downward and to the right each time said wheel makes a partial turn, and then back to their original positions upon the completion of its revolution. As said lever or arm and arm 18 thus swing together, through the agency of the connecting rod 15, the carrier and blade are made to descend until the blade-edge reaches the table 1 and just penetrates the usual wooden strip provided therefor.

To adapt the blade to receive a drawing motion after the clamp reaches the material to be out, the clamp is supported by-the bar 31 pivoted thereto at 32; while the upper end of said bar is pivoted at 33 to the shoulder 34 rising from the blade-carrier. Hence the clamp rises and falls with the carrier being restricted to a strictly vertical movement by its guide-ribs 37 sliding in the ways 40, 40; while the carrier is capable of a longitudinal motion as well.

When, now, the carrier and clamp descend until the clamp reaches the pile of paper to be cut and can hence go no farther, the only way in which the carrier can continue to descend is to move toward the right hand side of the machine to a distance determined by the swing of the bar 31 about the bolt 32. The deeper and heavier the out which the blade is forced to make, and the greater the resistance which it must overcome, the heavier the pressure which will be applied to the clamp through the bar 31. Consequently the clamping pressure is automatically i11- creased in proportion to the thickness or resistance of the material being out.

To make sure that the carrier and clamp shall move together vertically until the material to be cut is reached, a locking device is provided consisting of the bolt 35 projecting from the elbow 36 and entering a shallow depression in the top edge of the carrier; said elbow being integral with the clamp, or otherwise made rigid therewith. Said bolt is preferably given a resilient pressure against the carrier in order to relieve the shock with which parts come together in their upward strokes. Thus locked together, the carrier and clamp descend under the action of the arms 20, 18 in a vertical path; the blocks 16, 16 sliding along the ways 13, 13; but when the pile of paper is reached by the clamp, then the carrier sinks and swings out of its engagement with the bolt 35 and continues its journey alone as above described.

For positioning a pile of paper without moving the clamp or carrier down close thereto, I provide the gage consisting of the rod 50 slidable vertically in a groove in the front face of the clamp, with its front face flush with the rear of the blade 10. This rod is manipulated by a finger 51 at its upper end, and is normally retained in its elevated position by means of a coiled spring 52 surrounding the elongated bolt 53 tapped at its lower end into the clamp, and passing through said finger. This bolt acts both to support said spring and to better maintain the vertical position of the gage rod.

In Figs. 1 and 3, the gage rod is shown depressed, but is normally held by said spring with its lower end wholly concealed behind the blade. In use, it is pressed down until its lower end rests upon, or nearly contacts with, the pile of paper; its front face revealing the path along which the blade will descend in the operation of trimming or cutting the papers.

For causing the machine to automatically stop at the end of a single operation of the cutter-blade, the gear wheel 25 is connected by a pinion 28 to the shaft 29 on which is loosely mounted the pulley 7 O to which power is communicated by any suitable means, as a belt. Fixed on said shaft are the arms 73 joined by links 72 to the friction shoes 71, which, when strongly pressed into frictional engagement with the inner surface of the pulley-rim, cause the shaft 29 to revolve with said pulley. To thus operatesaid friction shoes, the clutch member 63 is formed with lugs 64 to which are pivoted the struts 65 pressing at their outer ends against said shoes. This clutch member is actuated by means of the arm 62, shaft 61 and hand-lever 60; and is unshpped by the engagement of a projection, as 7 7 on the gear wheel 25 with the lower end of the arm 62.

To allow for adjustment, the part 75 on the lower part of the arm 62 which is engaged by said projection, is a separate piece and joined to the arm by a bolt 76 penetrating a slot in said part.

It may sometimes happen that the wheel 25 will stop, after being unclutched as above, with the projection 77 so close to the part or nose 75 that the two will contact when the attempt is made to throw the clutch in, and by preventing the arm 62 from being moved, the machine-cannot be started. To remedy this I form the said projection 77 not as apparently a pin as indicated in Fig. 1, but a pivoted latch movable between stops 7 7 b and normally kept in contact with one stop by a tension spring 7 7 Said spring is disposed to normally retain said latch into contact with the stop ahead thereof as the wheel revolves. Hence when the latch first meets the nose 75 it is moved back against the rear stop, and, thus supported, actuates the clutch mechanism. The instant the clutch mechanism is thus actuated, and the latch carried past the nose 75 ever so slightly, such latch swings forward against its forward stop and thus far enough away from said nose as to be incapable of undesired interference there With.

To ensure the immediate stopping of the mechanism when unclutched, I provide the clutch member 63 with a cone 68 disposed to enter a corresponding cup 69 rigid with the shaft bearings. The friction between said cup and cone quickly brings the moving parts to rest.

In operating this machine, the pile of paper is first suitably positioned upon the table 1, using if necessary the gage 50, and then the hand lever 60 is raised. This action throws the clutch mechanism into engagement; the gear wheel 25 turns; the clamp and cutter blade descend; the clamp stops upon reaching the paper; the blade completes its stroke with a longitudinal swing, cutting the paper; and then the blade returns to the level of the clamp, and both it and the clamp rise to their topmost position, the machine then automatically unclutching itself and the friction cone bringing the parts to rest.

What I claim as my invention and for which I desire Letters Patent is as follows, to wit 1. The combination in a paper cutter, of a vertically slidable clamping member, a vertically and longitudinally slidable blade and carrier therefor, means for vertically moving the clamping member and carrier simultaneously, means acting by an obstruction to the further descent of the clamping member to add a longitudinal movement to the carrier during the latters further descent, and a locking device holding the carrier and clamping member from relative motion until after the clamping member reaches such obstruction.

2. The combination in a paper cutter, of fixed ways, a blade-carrier, means for its operation, a clamping member, and a rod pivoted to both the carrier and clamping member and disposed to give the carrier a longitudinal motion during the portion of the latters descent following a cessation of descent on the part of the clamping member.

3. The combination in a paper cutter, of fiXed ways, swinging arms pivoted thereto, means for giving equal motion to both said arms, a blade-carrier slidable both vertically and longitudinally, connections between said arms and carrier slidable in the latter, a

Ways, and means connecting said carrier and clamping member and disposed to give the carrier a longitudinal movement upon a cessation of the descent of the clamping member. I 4. The combination in a paper cutter, of fixed Ways, swinging arms pivoted thereto, i

clamping member vertically slidable in said I means for giving equal motion to both said arms, a blade and carrier slidable on said ways, connections between said arms and carrier, a clamping member vertically slid able in said Ways, a projection rising "from said carrier, a link or rod pivoted to said projection and to said claniping member, at an oblique angle, and a lock normally retaining said carrier and clamping member against relative motion.

5. The combination in a paper cutter, of a blade-carrier, fixed ways contacting with the rear face of said carrier, swinging arms piv-, oted to said Ways, a connecting rod terminally pivoted to said arms,said rod being provided With terminal blocks slidable along ways formed on the front face of the carrier, and

the pivotal connections between said rod and arms being extended through slots formed in said carrier between the lastnamed ways,and means for swinging one of said arms and thereby operating said carrier and blade.

6. The combination in a paper cutter, of a blade carrier, fixed Ways contacting With the rear face of said carrier, swinging arms pivoted to said ways, pivot bolts held by said arms and extending forward through said carrier, nuts on said bolts for applying a pressure to the carrier and retaining it in contact with said ways, and means for simultaneously swinging said arms whereby front ways for said carrier are rendered unnecessary.

In testimony that I claim the foregoing invention, I have hereunto set my hand this fifth day of June, 1906.

WILLIAM H. GOLDING.

Vitnesses:

Tiios. L. N UTTER, A. B. UPIIAM.

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