US444138A

US444138A - Paper feeding and cutting mechanism for printing-machines

Info

Publication number: US444138A
Authority: US
Publication date: 1891-01-06
Anticipated expiration: 1908-01-06

Description

(No Model;)- 2 Sheets-Sheet 1. W. SCOTT. PAPER FEEDING AND CUTTING MECHANISM FOR PRINTING MACHINES.

Patented Jan. 6, 11891.

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(No Model.) 2 Sheets-Sheet 2.

W. SCOTT. PAPER FEEDING AND CUTTING MECHANISM FOR PRINTING MACHINES.

Patented Jan. 6, 1891.

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3 UNITED STATES PATENT. OFFIC WALTER SCOTT, OF PLAINFIELD, NEYV JERSEY.

PAPER FEEDING AND CUTTING MECHANISM FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 444,138, dated January 6, 1891.

Application filed October 18, 1889- Serial No. 327,445. (No model.)

To all whom it may concern.-

Be it known that I, WALTER SCOTT, a citizen of the United States, residing at Plainfield, in the county of Union and State of New Jersey, have invented an Improvement in Paper Feeding and Cutting Mechanism for Printing-Machines, of which the following is a specification.

In applications, Serial Nos. 205,693 and 268,973, heretofore filed by me, devices are represented for feeding in a greater or less length of paper for each sheet cut off and printed, and the cutter is rotated once for each impression; but the speed of motion of the knife at the time of cutting the sheet is made to correspond, or nearly so, with the speed of travel of the paper, and the acceleration and retardation in the movement of the cutter is obtained by two eccentric-gears. These gears, however, are difficult to make with the re quired accuracy.

In my present invention I make use of circular wheels and driving devices and a crankmovement that causes an acceleration at one part of the rotation of the cutting-cylinder and a retardation at another portion of the movement in consequence of the varying length of the crank leverage between the driver and the driven portions, and in the combination of mechanism is included an adjustment by which the position of the driving-crank mechanism to the cutter can be varied, so that the cut of the paper may take plaeein the portion of the revolution in which the peripheral speed of the cutting-cylinder. corresponds, or nearly so, to the speed of the- Fig. 1., Fig. 5 is an elevation of the same parts with a link to the crank instead of a slide; and Fig. 6 is a section illustrating a modification in, the adjustment. Fig. 7 is a face viewof the index-wheel.

.Wh=en two parts are upon diiferent centers or'axes of motion near each other and connected together so as to make one revolution in the same time, the crank or equivalent connection between one part and the other produces a differential motion faster at one part of the revolution and proportionately slower at another part of the movement, and this differential motion is in proportion to the distance between the two axes of motion. I combine the differential crank connection with the cutting mechanism in order that the movement of the cutter may correspond, or nearly so, at the time of the cut with the movement of the paper as fed in at a greater or less speed for longer or shorter sheets. It is to be understood thatin all cases the cuttingcylinders revolve without holding or drawing on the web of paper.

In the drawings the impressioncylinder is represented at B, the ranges of belts or tapes at 6 7. The train of gearing 28, 27, 26, 25, and 24 from the impression-cylinder for moving the other parts that drive the cutting and feeding devices, similar to those in my application Serial No. 205,693, and bevel-wheels 101 102, shaft 103, and gears 104 105 for giving motion to the belts 6 and 7, similar to those in my application Serial No. 268,973,

and the feed-rolls 2 and 3 and the changeable gear 33 and sector 31 are also similar to those in said application, and the cutter-cylinders 4 5 may be of any desired character, and the differential motion is given to the shaft 43,

the cutter-cylinders 4 and 5 being geared together.

The gear-wheel 0. receives its motion from the intermediate gear I), which for convenience is on a gudgeon supported by an arm I) and held by a clamp-screw b after the parts have been adjusted. This wheela gives motion to the shaft 43 of the cutter; but it is not connected directly thereto, but the differential crank-motion intervenes. As this differential crank-motion can be arranged in several Ways, I will describe some of those ways in which the parts may be placed.

In Figs. 2 and 3 the wheel a. is loose on the shaft 43, being held thereon by the washer or collar 0L2, and upon the frame A thereare stationary guides c 0 between which is a block 0 that is adjustable vertically by the screw 0 and in this block 0 is a circular central opening containing the ring 0 that is held inposition by flanges or peripheral ribs,

but it is free to be revolved within the said block, and this ring surrounds the shaft 43, and upon this ring are slides c for the reception of a roller 0 on a stud or crank pin projecting from the wheel a, and there are also slides c on this ring c for the pin or roller d on the crank (Z that is clamped to the shaft 43 by the screw (Z or other suitable means. It will now be understood that if the block 1: is raised until the center of the ring 0 coincides with the axis of the cuttershaft 43 the cutter will revolve at a uniform speed with the wheel a, and when the parts are in the positions shown in Figs. 2, 3 the speed of the cutter will be less at one part of the revolution than at another in consequence of the crank-pin c acting at a greater distance from the center of the ring than the roller (Z is from said center and the reverse, and by adjusting the block a to the proper intermediate position the desired speed can be given to the cutter at the time it cuts the web of paper, thus allowing for adjusting the speed of movement in cutting the paper while the press is running without loosening any of the parts orconncctions be tween the gears and shafts. In this case the pointer t is to be upon one part c and the index-divisions on the other part 0", so that the proper position for agiven length of sheet can be indicated or noted, or by loosening the screw (Z and changing the position of the crank (Z in relation to the cutter the speed of movement can be varied at the time of the cut so as to correspond to that of the paper.

In Figs. 1, l, 5, and 6 the gear-wheel a, instead of being loose on the shaft 43, is loose upon an eccentric hub 71, that is supported by a rigid stationary sleeve 71, projecting from the frame A and surrounding the shaft t3, and there is a clamping-screw i, by means of which the eccentric hub 72 can be clamped to the sleeve h after it has been turned around to the required position. Upon this gear-wheel a, Figs. 1, t, and G, are slide-ribs Jr for the crank-pin and roller or block (I. This crank-pin (Z is shown in Figs. 1 and t as upon the crank (1 keyed fast to the shaft l3, and acting, as before described, to give motion to the shaft 48 and cutter. In these cases the differential action on the crank and cutter is the same as before described; but the eccentricity or distance between the center of the shaft 43 and the center of the wheel a is always the same, and the speed of the cutter at the time the paper is cut is adjusted by turning the eccentric hub h around on its stationary sleeve 7i and clamping it. I have shown in Figs. 1 and 5 a circular range of divisions on the face of the eccentric huh and a pointer at i and the marks are to be such as to guide the pressman in properly placing the parts according to the speed of paper and length of sheet fed in each complete movement of the printing-press.

In Fig. 5 the same parts are shown as in Figs. 1 and 4, with the exception of a link 7.,

connecting the end of the crank (l to the gearwhecl a instead of the slide-ribs h and crankpin and roller (1, the movements and adjustments remaining unchanged.

In Fig. 6 there is a disk Z, thatis loose upon the shaft 43, and the crank-pin and roller (1 is upon the back of this disk, and there is a circular undercut groove n in the face of this disk for the clam ping-bolt and head a, that takes the place of the crank-pin of the crankarm (Z keyed upon the shaft 43. By loosening this bolt a the crank arm and shaft can be turned around to occupy any desired position in relation to the roller and crank-pin (I, so as to adjust the cutter to the position where it will be moving at the proper speed when the paper is out. In all these cases the differential crank-movement resulting from the eccentricity of the circular ring or wheel to the axis of the crank-arm causes an acceleration at one part of the revolution and a retardation at anothcrpartof the revolution, and the speed of the cutter when acting on the paper depends upon its position in rela tion to the differential crank-motion.

It will be apparent that when the press is adapted to print two complete sheets each revolution the cutter should revolve twice to each complete movement of the press. In some presses the cutter is withdrawn into the cylinder at one revolution and projected the next revolution. Hence when this character of cutter is employed with my improvement the cutter may revolve twice in making one out.

In some presses where the paper is supplied from a roll and cut the printing-cylinder makes two or more revolutions for each sheet cut off.

My improvements are available in any press where the length of paper for each complete movement of the press is varied to suit the size of sheet to be printed.

I have described the crank as upon the shaft of the cutter-cylinder. It may be on the shaft of the male or female cutting-cylinders or upon a separate shaft or stud geared to the same.

In Figs. 2 and 7 the gear-wheel a is shown as in two parts, the rim being connected to the body by bolts passing through one part, with the heads in an annular groove in the other part. It will be understood that by loosening the bolts 72/, that connect these two parts of the wheel (1., Figs. 2 and 7, the feeding and cutting mechanism is free to be turned independently of the printing mechanism. Hence after the gear 33 has been changed to give the proper length of paper and the position of the differential crank mechanism has been adjusted to adapt the movement of the cutter to that of the paper at the time the cut takes place the parts are turned by hand until the paper is brought properly up to the grippers, and then the bolts a are tightened to connect the two parts of the wheel a in train of gearing, so that the parts will all 'IIO move together as the press is run; and I remark that it is advantageous to number the changeable gears 33, that go on the shaft of the paper-feed roll 2, and to place the same numbers on the index for the pointer of the differential crank mechanism, so that the numbers will indicate the proper positions of the parts for giving to the cutter the movement required for the given size of sheet, and that the same numbers may be used in connection with the index i on the two-part gearwheel a, Figs. 2 and 7, and this two-part gearwheel may be the wheel a, Figs. 1, at, and 6, or it may be either intermediate gear-Wheel between such wheel Ct and the wheel 27 on the shaft of the type-cylinder.

I claim as my invention- 1. The combination, with the feeding-rolls and changeable gears for feeding in a greater or less length of paper each movement of the press, and a cutter for separating the paper, of a crank connected with the axis of the cutter, and a wheel or ring occupying an eccentric position to the axis of the crank, and gearing for imparting motion to the crank and ring or wheel, substantially as set forth.

2. The combination, with the cutter for separating the web of paper and the printing mechanism, of the differential crank mechanism intervening between the gearing of the printing-press and the cutter, to rotate the cutter each movement of the press and to impart an accelerated and retarded movement, and feed-rolls and changeable gearing for varying the speed, substantially as set forth.

3. The combination, with the cutting and feeding mechanism in a printing-press, of a ring or wheel around the crank-shaft or axis of the cutter and occupying aposition eccentric thereto, gearing for connecting and rotating such ring or wheel in harmony with the printing mechanism, and a crank-pin connected with the crank-shaft and receiving its motion from the eccentric wheel or ring, substantially as set forth.

4. The combination, with the feeding and cutting mechanism for the paper-Web in a printing-press, of a loose wheel on the axis of the cutter, a wheel or ring eccentric to the axis of the cutter, an adjustable support for varying the relative position of the wheel or ring to the axis of the cutter, and the differential crank connections, substantially as set forth, for giving to the cutter an accelerated and retarded movement, as set forth.

5. The combination, with the feeding and cutting mechanism in a web-printing press, of changeable gearing to vary the paper-feed and a differential crank mechanism betweenthe gearing of the printing-press and the cutter, and an index to denote the relative positions of the parts in the differential crank mechanism as they may be adjusted to adapt the speed of movement of the cutter to that of the paper, substantially as set forth.

6. The combination,with the printing mechanism,of feeding-rolls, changeable gearing for varying the feed, a cutter for separating the paper, differential crank mechanism for giving motion to the cutter, and a loose wheel and clamping device intervening between the gearing of the press and the differential crank mechanism for allowingthe movement of the cutting and feeding mechanism in ad justing the parts and then clamping the parts in their proper relation to the printing mechanism, substantially as specified.

7. The combination, with the printing mechanism, of feeding-rolls, changeable gearing for varying the feed, a cutter for separating the paper, Variable mechanism for giving to the cutter a speed of movement when the cut takes place approximating that of the web of paper, and a loose wheel and clamping device intervening between the cutter and the press for allowing the cutting and feeding mechanism to be moved by hand to bring the sheet properly to the printing mechanism and for clamping the parts after adjustment, substantially as specified.

8. The combination, with the printing mechanism, of feeding-rolls,changeable gearing for varying the feed, a cutter for separating the paper, variable mechanism for giving to the cutter a speed of movement When the cut takes place approximating that of the web of paper, and a loose wheel and clamping device intervening between the cutter and the press for allowing the cutting and feeding mechanism to be moved by hand to bring the sheet properly to the printing mechanism and for clamping the parts, the changeable gearing and the respective indicating devices being marked to correspond for determining the proper positions of the parts according to the sizes of sheets, substantially as specified.

Sign ed by me this 14th day of October, 1889.

XVALTER SCOTT.

Witnesses:

GEORGE T. PINCKNEY, WILLIAM G. MOTT.