US2413554A - Sheet cutting and creasing press - Google Patents

Description

Dec. 31, 1946.

-A.v J. `EVERS SHEET CUTTING AND cREAsING 'PRESS original Filed No. 4, 1943 14 sheets-sheet 1 Y n w uio etu/ E IN V EN TOR.

SHEET CUTTING AND GREASING PRESS 14 Sheets-Sheet 2 Original Filed Nov. 4, 1943 INVENTOR.

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Dec. 31, 1946. A. J. EvERs 2,413,554

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SHEET CUTTING AND CREASING PRESS 14 Sheets-Sheet 8 Original Filed Nov. 4, 1945 Dec. 31, 1946. A. J. EvERs SHEET C-UTTINGQAND CREASING FRESS 14 sheets-'sheet 9 original Filed Nov. 4, A1943 Dec. 31, 1946.

A. ,1. EvERs SHEET CUTTING AND CREASING PRESS Original Filed Nov. 4, 1943 14 Sheets-Sheet 10 Dec. 31, 1946. A. J. EvERs 2,413,554

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A. J. EVERS SHEET CUTTING AND CREASING PRESS original Filed Nov, 4. 1943 l14 sheets-sharm Dec. 31, 1946. A 1 EV'E'R'S SHEET CUTTING. AND VvcxzmsnmV rnEss 14 Sheets-Sheet 13 Original Fi1ed Nov'. L4, 1945 IIIIIIIIIIII ll IN V EN TOR.

A. J.' EvERfs SHEET CUTTING AND CREASING PRESS Original Filed Nov. 4, 1943 14 Sheets-Sheet 14 lll INVENTOR. y

Psanisd Dee. 31, 194s v, y v 2,413,554

UNI-'rsp STATES, PATENT .or-'rica V 413.554-

snaar cuir'rmo Ann carissimi rasss n y Arthur J. Evers, nrookiynmr., signor to c. n. Cottrell a: Sons Company, Westerly, B. I., a corporation of Delawarel Original application November 4, 194,3, Serial No.l

Divided and this application Deceniber 21, 1945, Serial No. 638,388

. l This invention is directed to a novel method of cutting and creasing sheets, as. for instance. y

l cally, the several stages through which the sheets pass from the blanks to the finished or cut and creased products; v l

Fig. 6 represents a side elevation of so much of the machine that includes the invention;

Fig. 7 represents a iront elevation at the delivery end of the machine;

Fig. 8 represents a detail iront elevation of the upper portion oi the delivery end, on an enlarged 2 Claims. (Cl. 164-19) Fig. 24 represents a similar view showing the gripperretracted: V

Fig. 25 represents a vertical section showing the spring means for yieldingly holding the gripper actuating shaft in both of its positions;

. Fig. 26 represents a detail plan view partly in section of a portion of the carriage showing the suction devices applied thereto;`

Fig. 27 represents a longitudinal section taken in the plane of the line 'XXVII-XXVII of` Fig.

Fig. 28 represents a detail side elevation of the manifold and adjacent mechanism for controlling the actuation oi the suction devices, on a scale similar to that` shown in Figs. 6 to 20 inclusive;

Fig. 29 represents a detail plan view oi the same scale; partly in section;

Fig. 9 represents a detail side elevation oi the palr'lgx; :gents a detail end View 0f the 8am@ i sheet handling carriage dr ving means and the 2o j Fig. sirepresents s detail side elevation c: the

reciprocating upper platen partly in section:

Fig. 10 represents a detail side elevation of the carriage driving means;

Fig. ll'represents a detail vertical section taken in the plane of the line XI-Xi oi- Fig. 10, looking in the direction of the arrows;

Fig. 12 represents a detail vertical section taken in the plane of the line XII-XII of. Fig. il, looking in the direction of the arrows;

Figs. 13 and 14 represent a detail longitudinal section through the carriage showing the means for raising and lowering the same;

Fig. 15 represents a detail vertical section taken in the plane of the line XV--XV of Fig. 13,1001:- ing in the direction of the arrows? l Fig. 16 represents a detail longitudinal section similar to Fig. 13 showing the parts in another position and carriage raised;

Fig. 17 represents a detail plan view of certain of the parts shown in Figs. 13 and 15:

Fig. i8 represents a detail longitudinal section tion oi' the arrows and shown on a greatly enlarged scale:

Fig. represents a detail end elevation of a portion ofthe machine partly in section and on a scale similar to that shown in Figs. 28'to 33 inclusive, and showing the actuating mechanism plate 9 which coacts with the die 'I Ato cut and' o! the reciprocating platen:

Fig. 36 represents a detail plan view oi the gearing and adjacent parts for raising and lowering the upper platen; and

Fig. sv represents s detail vertical section taken m of in the plane of the line XXXVII- Fig. 36, looking in the direction of the arrows.

The press trame comprises generally the base member I andthe frame members 2 and I.

'I'he pile oi' blank sheets at the feed or rear end of the press is denoted by l and the pile of cut and creased sheets at the front or delivery end oi the press is denoted by I.

The stationary lower platen t ot the press car, ries the cutting die 1 which die is arranged to cut and crease at one operation. blank sheets oi various shapes and sizes.

' The movable upper platen! carries the cutter crease the blank sheets as theyar'e successively ted. into the press. This upper platen 8 is conreciprocating movements by the following elements: a two-part lbox cam 55,I is mounted to oscillate with the shaft 52 and arranged to receive a stud or roller 52 eccentric-ally carried by The following means are provided for vertically reciprocating the upper platen 8 at a varia-ble speed so that the platen may be speeded up as it nears its sheet cutting and creasing position and slowed down after it leaves said position, thereby allowing suillcient time for the reciprocation of the sheet handling carriage between the platens. An electric motor I4 (see Fig. 7) has its shaft i5 provided with a gear I5 which meshes wi-th a gear I1 on a cross shaft'IB which is provided with two gears I9 which mesh with their two gears 20 loosely mounted on the crank shaft 2| (see Figs. 36 and 3'1). This crank shaft 2| is provided with'crank discs 22 at its ends. These ycrank discs are .provided with spherical headed pins 23 engaging links 24 pivoted at 25 .to arms 25 projecting from the upper members 21 of toggle levers pivoted at 28 to the base frame (see Fig. 35). The lower members 29 of the toggle levers are pivoted .at 35 to the lower cross heads I2 of Ithe upper platen 5. The cross shaft |8 is also provided with two gears 32 which mesh with gears 33 on cam shafts 34 (see Fig. 36).

A gear fast on the shaft 2| meshes with a pinion |3| fast on a shaft |32 mounted in a swingingl support |33 which is oscillated on the shaft 2| by means of links |34 eccentrically pivoted at on the gears 33. Gears |35 on Ithe shaft |32 mesh with gears |31 carried by the stud shafts |35 on the swingingsupport |33 which gears |31 mesh with gears |35 loosely mounted on the shaft2I. v

A track is provided for guiding the sheet handling carriage in its reciprocating movement. which track is raised and lowered by the elements connected to the cross shaft I8, as follows:

One of the cam shafts 34 (see Fig. 13) carries a box cam 35 which engages one arm 35 of a rock lever pivoted at 31, vthe other arm 35 of which rock lever is connected by a link 39 with an arm 4|) of a rock shaft 4|. The arms 42 of said rock lever are pivoted Ito their respective side rails 43 of the carriage track. These side rails 43 of the track are also supported at intervals by pairs of rock arms 44 and 45.

The sheet handling carriage 45 (as it is raised and lowered with its track side rails 43) is shown as reciprocated on the track rails 43 by the following elements (see Figs. 16 and 1'1): a pair of rack bars 41 areslldably mounted in guides 45, which rack bars are provided with yokes 43 to receive studs or rollers 55 carried on the opposite sides of the carriage 45. These two rack bars 41 are reciprocated by two gears 5| fast on an oscillating cross shaft 52 (see Figs. l0, 11 and 12)` which carries a gear 53 meshing with a gear 54 mounted on a stud shaft 55. A pinion 55 which is integral with the gear 54 meshes with a vertically disposed rack bar 51 mounted to slide in a bracket 58 carried by the press frame 3.

This rack bar 51 (see Figs. 9 and 10) is reciprocated by means of an arm 53 which is one of the shafts 34.

The`sheet handling carriage 45 (see Figs. 9

and 10) is retarded and accelerated during itsv the 'gear 54. The shape and relative positions of the two parts 50 and 5| of this `oscillating cam Serve to control the rotary speed of the shaft 52 during its oscillations and hence .the variable sliding movement of the rack bars 41 through th pair of gears 5| on the said shaft 52.

The throw of the arm 53 which is carried by the shaft 34 controls the length of the reciprocating movement of the rack bar 51 and thereby the number of rotations (in .the present instance about two and one-half rotations) in each direction of the pinion andthe gear 54 which gear carries lthe stud or roller 52. The oscillating movement of the stud or roller 52 causes it to alternately enter the two parts 50, 5| of the box cam and thus cause the cam to oscillate the shaft 52 with a variable rotative speed in .both direc'- .tlons. lThis oscillating movement of the shaft 52 will cause its gears 5| to reciprocate the two horizontally Y disposed rack bars 41 along their guides 45.

The means on the sheet handling carriage 45 for advancing a newly fed blank sheet into the press and simultaneously delivering a previously cut sheet. out of the press, during one stroke of the carriage comprises sheet grippers and suction devices respectively.

The means on .the sheet handling carriage 45 for advancing .a newly fed blank sheet from the feed pile 4 into .the press .comprises thefollowing sheet from the pile 4 as Ithe carriage reaches the end of its rearward or return stroke and to release the sheet as the carriage reaches the end of its forward or advance stroke.

The means for opening and closing these grippers 53, 54 comprises the following elements: (see Figs. 18 to 24) the lower movable :lawsv 54 of these grippers are connected by links 55 to spring pressed bars 5.5 slidable in the tube 51 which extend lengthwise of the carriage. The forward ends of these bars 55 are connected by links 55 to arms 55 fixed to a crossrock shaft 10 mounted at the forward end of the carriage. A

cam operated lever 1| is also fixed to the rock shaft 10, one arm 12 of said lever carrying a a lengthwise movable bar 15 slidable in hangers 15 depending from the track rail 43, which cams are located in' position to engage their respective studs or rollers 13 and 15 to rock the lever 1| to carried by close the grippers 53, 54 onto the newly fed sheet at the end of the return stroke of the carriage and to open the grippers at the end of the forward stroke of the carriage. Spring means 15*- sex'ves to yieldingly hold the gripper actuating shaft 15 in both of its positions. Y

' One arm 55 of a rock lever pivoted on the cross shaft 5| is connected by a link 52 to the bar 15, the other arm 53 of which lever is connected by a link 54 to the uprising frame 55 of a rock lever pivoted at 55, the depending arm 51 -of which the lever is engaged by a box cam 55 fixed to cross shaft 34. f

Suction devices on the lower platen are provided for holding the newly fed sheets against displacement on the die 1 during the cutting and y creasing operation. Suction devices are also provided on the sheet handling carriage for lifting the cut and creased sheet fromv the die and conveying it to a point over the delivery pile simultaneously with the feeding' of a new sheet intothe press; means being provided for controlling the operation of the suction devices at the proper llil communication with branch pipes 86 and 86* I by bridge ports 81 and 91* in valves 88. 88* carried by a bar 88 operated at the proper times by a rock lever |00, |0| pivoted at |02 and connected by 'a link |08 toa rock lever- |04. |05 pivoted at |08, which rock lever is connected by a link |01 to the uprising arm |08 of a rock lever pivoted at |08, the other arm||0 of which lever carries a stud or roller .engaged by a box cam ||2 fixed to the shaft 84. The above mentioned branch pipes 96* are connected through pipes ||8, ||4,to a lower manifold ||6. This lower manifold is provided with vertical branches ,H6 which are connected by flexible tubes ||1 and elbows ||8 to horizontal passages ||8 in the lower platen 6. Ports in the lower platen lead to suction devices |2| in the die 1.

The branch pipes 86 are connected 'through pipes |22 and elbows |28 to spaced horizontal pipes |24 extending lengthwise of the carriage 46. The bottom walls of these pipes |24 are in open 4communication at all times with the suction devices |26.

The cutter plate 8 is herein shown as secured by bolts |26 and keepers |21 to the upper platen v8. To prevent the bucklingl of the cutter plate suction may be exertedv thereon at all times through a pipe |28 leading from the main'exhaust pipe 82 to a suction chamberl |29 in the lower face of the upper platen 8.l I

In operation, any well known or approved shee feeding mechanism, not shown herein, may be employed for bringing the blank sheets from the to movethe previously cut and creased sheet out of the press. As the carriage approaches the end of its forward movement it will be lowered by the lowering of the track to bring the newly fed sheet into its proper position on the die and the previously cut and creased sheet to its position over the delivery pile 6. The suction devices |2| on the die will then be operated to hold the newly presented sheet in position on the die.

The upper platen 8 at this time has been moved downwardly into position to cause the die and cutter plate to coact on the newly fed sheet to cut and crease the same, it being understood that the movement of the carriage is'stopped at this time. p

As it has been previously explained, the variable speed reciprocating movement of the carpile 4 into proper end and side register` yto be grasped by the grippers 88, 84 on the rear end of the sheet handling carriage 46 at the limit of its rearward or return stroke.

As the carriage is about to start on its variable speed forward stroke, its grippers 63, 64 are clsed by the cam 88 on the cam shaft 84 which is driven from the `motor |4, thusI causing the grippers to grasp the leading end of the newly fed sheet. The previously cut and creased sheet on the die is released by its suction devices |2| on the die and engaged by the previously cut and creased sheet delivery suction devices |26 on the carriage.

As the carriage starts on its forward stroke it is riage is accomplished 'by the related movements of the shaft |8, gears 82, 88, shaft 34, crank arm 68, rack bar 61, its pinion 66,gear 64, stud or roller 62, "two part oscillating box cam 60, 6|,

gear 58 on oscillating shaft 62, gears 5I and horizontally disposed rack bars 41.

The grippers 63, 64 on the carriage will be opened, Vand retracted after the carriage has moved forwardly to complete its stroke thereby bringing the grippers beyond the advance edge of the newly fed sheet. The suction devices |26 on the carriagevwill then be released to permit the previously cut and creased sheet to be delivered onto the pile 6.

As the upper platen and the carriage start on their respective return strokes the suction devices |2| on the die will still hold the newly fed cut and creased sheet on the die. The grippers 63, 64 on the rear end of the carriage will at the same time be raised above the said sheet by the raising of the track on which the carriage reciprocates.` The carriage then proceeds in its raised position on its return stroke between the upper and lower platens. As the carriage nears the limit of its return stroke it is lowered by the lowering of the track. This lowering movement of the carriage will bring its suction devices into contact with the newly cut and creased sheet and its grippers in position to grasp the leading endv to go down on the sheet for the removal of the` same, at which time suction is started on the devices |23 of the carriage and cut oil from the suction devices |2| in the die. l

It will be understood that the suction devices on the die and carriage are alternately operated from the box cam ||2 on the shaft 34 through the rock lever |08, H0, link |01, rock lever |04, |06, link |03, rock lever |00, |0I, bar 99, connected manifolds 93, 85, pipe 82 and suction pump 88. In Figs. 1, 2 and 3 the suction devices on `the carriage will be on andthe suction devices on the die will be om In Figs. 4 andl 5 the suction devices on the carriage will be ofi riage will cause the grippers 88, 84 to move the newly fed sheet into the pressand at the same time cause the suction devicesA |26 on the carriage and the suction .devices on the vdie will be on.

It will -also be understood, from the above description and the drawings, that the platen operating mechanism. the carriage raising and lowering mechanism, the gripper operating mechanism and lthe mechanisms for controlling the operation oi the suction devices carried by the lower suction on the preceding cut vand creased sheet Afor removing it from the die and delivering the ,2. The method of cutting and creasing successive sheets by the repeated coaction of a die and its cutter plate, which includes feeding a sheet to the die and at the same time exerting suction on the preceding cut .and creased sheet for removing it from the die and delivering the sheet and holding the successive sheets on the die by suction during the cutting and creasing operation.

\ ARTHUR J. EVERS.

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