US1880598A - Paper cutting machine - Google Patents

Description

Oct 4, 1932 R. TYLE-R E1' AL 1,830,598.

PAPER CUTTING MACHINE Filed sept. 27, 1929 2 'sheds-sheet 1 5 g i INVENToRs l a/,b/z. S @20' 4M- Y EN '3 By Heie/' /72'1-c @fa/7e.

Oct. 4, 1932.4 R. s. TYLER EfrAL PAPER CUTTING MACHINE Filed sept. 27. 1929, 2 sheets-sheet Y ATTORTEYS.

Patented Oce 4, i932 UNITED STATE PATENT Soi-'ric RALPH S. TYLER ANI) HERBERT MCGEORGE, F CLEVELAND HEIGHTS, GHIO,

TO THE CHANDLER AND PRICE COMP, 0F CLEVELAND, OHIO, A. CORPORATION maar. terrine mem Application med September 27, 1929. Serial No. 385,515.

i The present invention, relating, as indicated, to paper cutting machines, has more particular reference to machines of the. type employin a binder for forcibly clampmg a stack of s ieets of paper against an immov- .able bed, and a reciprocable knife for severing such/sheets along a line proximate to the engaging edge of said binder.

Heretofore, paper cuttin(Y machines of the type referred to have usually been provided with wholly mechanical means for operating the binder. Such lmeans, while satisfactory and extensively used, are objectionable because of their complexity, and, moreover are not commonly arranged in such a manner as to ermit of independent power movement vof tlhe binder. As ordinarily constructed the binder can bevindependently operated by amanually pressed treadle, but the clamping 2o force exerted is limited by the operators strength. If power is to be applied to the binder in order to augment its pressure,

against the paper, itbecomes necessary to reciprocate' the knife since the binder and knife are so connected to the source of power as to be unadapted to independent power operation. For some purposes, it is desirable not onl to forcibly operate the binder independent y of any knife movements, but 36 to ,exert a powerful clamping force over a considerable eriod of time.

Our invention, with the object of simplifying and improving the construction of paper cutting machines, provides fluid pressure means for operating the binder, such means being adapted to permit of normal operation, and yet designed in such a manner as to make it possible toioperate the binder either independently of the knife, or in synchronized 40 relation to the movementsof the knife. For effecting this system of binder control, our invention contemplates providing, in combination with a pump and pressure cylinder, a valve for determining the effect of fluid displaced by such pump, this valve being connected tooperating gear of such design as to make it possible not only to independently operate the binder either manually or b applied power, but to also maintain it in orceexerting position for any desired period of time. j

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly ointed out in the claims.

The annexed rawings and the following description set forth in detail certain strucv ture embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention ma be used.

In said annexed rawings:

Fig. 1 is a side elevational view of a paper cutting machine embodying the present im* provements, certain of the parts being brok'- en away and othersA either omitted or shown diagrammatically to avoid confusion; Fig. 2 is a more or less diagrammatic rear elevation showing some of the'parts -illustrated in Fig. l; and Fig. 3 is a diagrammatic view illustrating the interior construction and manner of operation of the pressure cylinder control valve.

In the drawings, and with particular reference to Figs. 1 and 2, our invention is-shown in association with a papencutting machine comprising side frames 1 and a bed or table 2., Above the'table 2, the side frames 1 are provided with slots 3 for receiving a knife bar 4 which is connected by rods 5 with cranks 6 mounted upon the opposite ends of a horizontal shaft 7 The shaft 7 is driven by anothershaft 8 through suitable gears 9 and 10, While the latter shaft is d riven through a clutch 11 by a. pulley l2 mounted upon a continuously rotatingshaft 13 res volved by a suitable motor 14. The shaft 13 carries a second pulley 15 for operating a 'pump 16, and the shaft 8 carries a brake wheel 17 controlled by a brake band 18.

The clutch 11, or more exactly s eaking, its operating cone 19, and ,the brake and 18 are actuated by a rocker shaft 20 which carries a fork 21 anda cam 22, the former, when the-shaft 20 is oscillated in one direction, effecting an engagementof the clutch 11, and the latter at the same time releasing the brake band 18 through a ivoted and connected member 23. Similar y, when the shaft 20 is oscillated in a contrary direction, the clutch 11 is disengaged and the brake band 18 tightened around the brake drum 17. For efecting these rocking movements of the shaft 20, a ever 24 is provided, this lever being pivoted upon a transverse rod 25 and provlded with extensions 26 and 27. The extension 26 carries a roller for cooperating with a helical or spiral cam 28, and the extension 27, through a rod 29 and a lever or arm 30, rocks the shaft 20 and, therefore, controls the clutch 11 and the vbrake band 18. When the knife bar 4 has completed a cutting stroke and re-l turned to its upper and inoperative position, the cam 28 lifts the extension 26, thereby disengaging the clutch 11 and applying the brake band 18 to the brake drum 17 For each succeeding stroke of the cutting knife,

it is necessary to first rotate the lever 24 about its longitudinal axis, thus freeing the' lever 24, thus, engaging the clutch and releasing ,the brake l{inlileparatory to another down stroke of the ife.

The binder 32 operates in grooves 33 in the side members 1, and, below the table 2, is

provided with a cross-head34. rIfhe binder is normally held in an elevated position by springs 35r encircling rods 36 suspended by nuts 37. The springs 35, at their lower ends, seat in concave annular grooves in nuts 38, and, at their upper ends, supportthe binder 32 which has outwardly projecting lugs provided with forks 39straddling flats on the rods 36 in the manner illustrated in Fig.-2. P'ject-ing through an opening in the crosshead 34 is a piston rod 40 which connects with a piston in the cylinder 41,. this cylinder being connected through pipes 42 and 43 with a control valve 44 which communicates with the pump 16 through pipes 45 and 46. It will be apparent from an inspection of Fig. 1 that the cylinder 41 is suitably anchored; and from an inspection of Fig. 2 it will be understood that the cross-head 34 is free to move downwardly when the piston rod 40 is depressed, such rod having a nut 47 which engages with the cross-head 34 when a power effected descent of the binder 32 is desired,

, andyet permits of manually drawing down this treadle bein preferably counter-weighted as shown in ig. 1 in order to retain it in anelevated position, and connectin with the cross-head 34 through flexible c ains 49. Such chains, when the binder is being operated by the piston rod 40, merely flex or buckle without transmitting the cross-head motion to the treadle 48,this treadle therefore remaining stationary and in the elevated position shown in Fig. 1. The treadle 48 is pivoted to a transverse shaft 50, and this same shaft also carries one end of a second treadle 51 which may be normally held in an elevated position by a compression spring 52. The treadle 51 through a chain- 53 connects with a link 54 and is intended for effecting suitable movements of the valve 55, to thereby operate the binder 32 independently of any knife movements, without affecting the position of the handle 24, and without depressing the treadle 48. If desired, the treadle 48 may be employed for drawing down the binder manually and the treadle 51 then o erated to admit uid to the cylinder 41 for o taining a power effected clamping action. But, as above stated, all binder movements can be produced by the treadle 51 alone, and for securing such treadle in a depressed position a latch 56 is provided, this latch enabling the operator to not only pull down the binder, but to hold it in a power effected clamping position for any desired period of time.

The link 54, as best shown in Fig. 1, has one of its ends connected to the extension 27 and its other end connected to the valve stem 57. The extension 27 has an overlying part 58 which normally contacts with the top surface of the link 54 and yet allows such surface to be moved downwardly by the treadle 51 without thereby moving the handle 24. When movement of the valve stem 57 is effected by the handle 24, the part 58, of course, comes into contact with the link 54 land through such link operates the valve stem 57. The valve stem 57 is normally held in an elevated position by a spring 59, and all valve movements are resisted by such spring which also functions to return the valve stem after having been forced down either by the treadle 48 or by manipulation of the lever 24.

As best lshown in Fig. 3, the valve 44 encloses a reciprocable member 55, such member, when in the elevated positionproduced by the spring 59, placing the inlet pipe 45 in' communication with a tube 43 leading to the bottom'of the cylinder 41, and the outlet ipe 46 in communication with a tube 42 eading to the top of the cylinder 41, these connections being respectively made through a circumferential groove 60 and radial and longitudinal passageways 61 and 62. As shown in Fig. 3, the valve 55 is in a neutral or inoperative position, such position being maintained by means hereinafter i is rigidly secured to the member 34 hasjexnneeaeee full described. In this neutral position liui from the inlet 45 circulates downwardly through the bore 62 and returns to the pum through the pipe 46. When forced furt er down, the valve 55 laces the inlet pipe in communication with the tube 42 through a circumferential groove 63, and the outlet pi v 46 in. communication with the tube 43 t ough the ducts 61 and 62, there by pullin down thebinder.

From t e foregoing descri tion it will be evident that the binder may set either by treadle 48 or treadle 51 depending upon whether or not it is desired to actuate the binder manually or b power., It will also be noted that thismay e done before the cutter is set in cperation by lever 24.. However, when desire the cutter and binder can be made to operate simultaneously by said lever- 24, thus dispensing entirely with the opera tion of treadles 48v and 51 rlhis result is made possible through the coaction of vthe extension 58 oli/the lever 24, which extension necessarily depesses the valve stem 57 so that the binder operates simultaneously with the cutter.

As shown in Fig. 2, thebracket 65 which tending therefrom an ear 66 adapted to movably secure the rody 67.- The rod 67 hasa col lar 68 slidably mounted thereon which may be fixed thereto in any desired position by means of the set screw 69. The upper end of the rod 67 has 4rotatabl. secured thereto the lever member 70 pivotedy at 71Vin the rigid projection 72. The lever member 70 has an end 73 extending therefrom and adapted to' engage the upper end of the valve stem 57.,

WVhen the binder is operated in'its fully open position the collar 68 is secured to the shaft 67 in such a position that when the binder reaches its fully open position the ear 66 of the bracket 6 5 will strike th thereby actuating the lever 72 which will move the reciprocal member of the valve to the neutral position, thereby relieving the operating mechanism from the strain to which it would be subjected were the binder permitted to pass upwardly against its stop without a disconnection of the hydraulic operating mechanism. By a diiferent setting of the collar 68 on the rod 67, the ear 66' of the bracket on the member34: can be made to strike such collar 68 and thereby move the reciprocal member 55 of the valve to the neutral osition before the binder has moved to the ully open position. This arrange- -ment permits operation of the binder to a partially open position when bundles of paper less than the full thickness ordinarily taken by the cutter are operated upon. The further advantage of this automatic control, as hereinbefore stated, is to disconnect the hydraulic operating mechanism from the binder when it has reached its fully open e collar 68.

position thereby relieving the strain to which the hydraulic operating mechanism would otherwise besubjected;

The pum suitable flui for eectin the desired binder movements. The particu ar pumpused has a variable displacement at a constant speed, is provided with valves for relieving excessive pressure, makes revision for varying the pressure at the 'scharge, and delivers a practically pulsationless current of oile These characteristics, and es ecially the last, are desirable in a pump uses for binder operation because anyirrgularity of the -binder motion is likely to ew or otherwise disarrange the paper being cut, and dierent papers do not require the same binder pres-- apparent that our invention, o

paper cuttin machines not only greatly simplifies their construction, but also makes valuable advances in the way of a more versatile control system. The control gear pro vided makes possible the followin features: independent manual operation of t e vindependent power operation of the binder; binder; synchronized binder and hife movements; static binderpressure exerted for any desired period of time; variable binder pressure; continuous pump action' uniformly applied pressure, increased binder speed; variable binder speed; and, finally, a more efiicient and enerally satisfactory arrangement for effecting the specified functions.

@ther modes of applying the principle of our invention may be employed instead of the one explained, change being made as regards the structure herein disclosed, provided the means stated byany of the following claims or the equivalent of such stated means be employed. Y

We therefore particularly point out and distinctly claim as our invention l. In a paper cutting machine, a mechanically operated knife, a hydraulically voperated binder, control means for 'actuating said binder manually independently of said knife, means operating said binder when said knife is operated, means for stoppin the knife at the top of its stroke and adJusta Ale means for stopplng the binder in its upward stroke at any desired point.. i

2. In a paper cutting machine, a mechanically operated knife, a hydraulically operated binder, control means for actuating said binder hydraulically independently of said knife, means operating said binder when said knife is operated, means for stopping the knife at the top'of its stroke and adjustable means for stopping the binder in its upward stroke at any desired point. Y

3. In a paper cutting machine, a mechanically operated knife, a hydraulically op- 16 may circulate oil or other l erated binder, control means for actuating said binder manually or hydraulically independently of said knife, said manual and hydraulic means being capable of joint operation, means operating said binder when said knife is operated, means for stopping the knife at the top of its stroke and adjustable means for stopping the binder in its upward stroke at any desired point. f

Signed by us, this 24th day of September,

RALPH s. TYLER. HERBERT. MCGEORGE.

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