US1108220A - Sheet feeding and registering mechanism for printing-presses. - Google Patents

Description

v G. E. PANC-OAST. SHEET FEEDING AND REGISTERING MECHANISM FOR PRINTING PRESSES.

APPLIOATION TILED JUNE '7, 1902.

Patented Aug. 25, 1914,

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ATTORNEYS 5& MQA M G. E. PANOOAST. SHEET FEEDING AND REGISTERING MECHANISM r011 PRINTING rnnssm/ APPLICATION FILED JUNE 7, 1902. v 1 ,1 08,220. Y Patented Aug. 25, 19 14 2 SHEETFSHBET 2.

WITNESSES ATTORNEYS GEORGE E, PANCOAST, or BROOKLYN, NEW YoRiz,

To all wizoin itmag concern:

A of Brooklyn, in the .useful Improvements in -.Sheet thesheets have to be instantly accelerated from a position of rest to the impression cylinder,

I Heretofore, been so constructed that 'wh which motion is imparted secure perfect register in come the register of the impressions on the sheets may sent the sheet asnearl y as possible at the illustrate by .way

'ASSIGNOR T0 AMERICAN LITHO- GRAPHIC COMPANY, A CORPORATION GEE NEW YORK.

SHEET FEEDING AND REGISTERING MEoHA'NIsJn FOR rnmrING-rEEssEs.

Specification of Letters Patent. f Patented Aug; 25, 1914,

' Application filed June 7,1902. Seria1No.110,570.

the principles of my invention and the best modein which I have contemplated applying those principles. .Ofthe rawings, side elevation of a Be known that I, GEORGE E. PANooA'sT, a citizen of the United States, and-a resident county of-Kings, State of New York, have'invented'certainnew and Feeding and Registering Mechanism for Printing- Presses, of which the following is aspecification. v My .invention'relates to a sheet feeding and registering mechanism, and it has for object to provide. a mechanism whereby sheets of paper or similar material may beuniformly and reliably presented in accurate register to high speed printing presses or similar machines.

In sheet presses it has been the common practiceheretofore to present thes'heets to a moving impression cylinder by means of which theforward edges of the sheets, are placed by hand, or otherwise, the gage beingmoved out of the path of the the proper time to deliver them to the im-' pression cylinder at the desired point there on. According to this principle of operation Figure 1 represents a portion of a printing press-constructed inaccordance with my inventiong'Fig. 2 is a plan iew of the same; Figs..3l and 4 are respectively a plan and a sectional side view illustrating a detail; lEjigs. 5, 6 and 7 are sectional views periods-of their operation; Fig. 8 is a view ent formof construction; Fig. 9 is a trans verse sectiona'l'view of thesame; Fig. 10 is a plan view; and Figs. 11, 1'2 and 13 are -(6I1d.- .views illustrating the operation of the -modified form of the device.

In accordance with my invention, the sheets are presented to the press at substan tially the same speed as that of the printing .and ression members, and the position of the s sets with reference to the printing and impression surfaces is determined in the press bysuitable positioning devices, which are carried by or move with the grippers and *WillhJ-fihtbfil' have av suitable movement relatively, to the sheet carrying member of the press for 'usting the sheets upon that the full speed of and it is found in practice that more or less slippage or lost motion between the sheets and the grippers on the impression cylinder is inevitable. moreover, the grippers have en coming into contact with the sheets they have a rearward motion relative to 'theimpression cylinder, more or less to the thereby causing the positions of the on the impression cylinder to vary.

cylinder 1- .a' web-cutter, or from a device for automatically separating'the sheets from .a pile, the sheet supplying device, whatever form is used,'- being timed sheet to the impressioncylinder for every printing revolution of the latter-and to read member. before they are secured theretoby the grippers.

.Referring to the drawings in detail, and at first to the form of the device shown in Figs. .1 to 7, 1 .represents the impression member of a printing-couple,

sheets, latter For these reasons it has been impossible to such presses espeheetsare supplied to the impression cially at high speeds.

'My invention has for an ob ect to over-- above mentioned difficulties and to provide a sheet feed press in which a perfect be secured at high as well as low speeds. I My invention consists in the-novel parts, improvements and combinations 'herein shown and described, I

The accompa 'ying drawings, WhlCh- .are referred to. herein and form a part hereof, of example,'two embodi; ,ments of my invention and serve in conned. tion with the description herein to explam the intermediate gear 6- which me'shes with from any suitable source, as from- 3 and 4;, of which thesimilar to that of Fig. 1 illustrating a differ:

as usual, to forward a the gear 5 and also with a gear 7 fixed on the shaft of the roller 4. Tapes 8 or, other suitable means, are provided to convey theforward edge of the iinpre'ssion-su'rface-"12 and 'is-provided'with a plurality of gripper carry the same to the bring said face 12,

'18 are preferab fingers 13. Preferably gripper fingers 13" are arranged tocooperate with the .upper surface of a-member 14 to grip 'the forward edges ofthesh'eets as they emerge from the guide fingers and 10 an oint of delivery. The

member leis remove l'y'secured to-the forward edgejof the impression surface '12 by screws 15. The grippers are brought-ina direction to grip the sheets by asuitable spring, (not shown) and they are opened to receive the sheets and deliver the same by cam 16 which is fixed to the frame- 2 at one end of the cylinder in position to engage the arm 17 secured to one end of the shaft 11. For the purpose of accuratelyfixing the position of the sheets on the impression sursuitable' positioni or gaging devicesare provided on the impression cylinder, said positioning devices being given a movement in the path of the sheets and in a backward direction with relation to the movement-of the impression member so as to engage the forward edges of the sheets and edges to 'a predetermined position with relation to the impression surface. In order that the position of the sheets may not be disturbed by the'grippers as they close thereon, the positioning devices "are caused to move with the grippers, the latter being ,to this end given a backward movementwith relation to the impression cylinder-as they approach the front edge of the sheets. Preferably the positioning devices are mounted directly on the grippers. As shown, the pogages 18 which are-adjustably secured to the inner side of *the gripper fingers "13 by screws 19 whiclrt-cpass through slotssin'the gages and :are'tapped to the fingers. To

prevent laterali'displacement? ofthe gages they are provided rwith pins-20 which en'- gage slots in the fingers as shown. With the object in- .view of preventing displacement of the sheet on the gagesthe member 14: is

provided with recesses 21 the gages; Theoperative faces of thegages ly arranged atsubstantially right anglestd the grippingisurfaces ofthe e grippers are' fingers 13' so that when 1; opened to recei' ethe sheets, the gages will -be located across the paths'of the sheets as. they leave the guides 9 :kindof recess, 1nto which and as shown,-the.

= ried backward to be formed in the delivery. mechanism.-

fingers close to 0 rollers 24 and sitionlng devices consist of abutments or.

adapted -to receive v For the .purposesoflifting the forward edges of the sheets so and 10 and so that License of the gagesand grippers will thus form a the forward edges of the sheets will be directed by the guides 9. a'nd'lO. Owing to the position-of the center of oscillation of the gripper fingers the operative surfaces of the latter together with the gages 18 will have a component of motion rearwardly with relation to the forward edge of the impression surface so that the forward edges of the sheets will be cara predetermined position .Withrelation to the impression surface Illa;-

d reason of this construction any'slight irregularity in the feed of the sheets will be compensated for. As the forward edges'o'fthe sheets are moved backwardly by the grippers and gages, a slight buckle orbend will sheet between the points of the grippers and the forward ends of the guides 9 and 10 as illustrated in Fig. (S gns the sheet is carried forward and into contact with a printing surface, the sliglhet buckle or bend formed in the sheet will caused to travel back so that everyportion of the sheet will occupy the same point on the impression cylinder that it would have occupied If it hadbeen fed onto the impression surface with its forward edge in the proper predetermined position. v

:.After the forward edgeof the sheet has been carriedv pastthe printing surface, it is transferred from the grippers to a suitable The delivery mechanism shown consists of a series of stripper 23 which are terminated at a'point der and act to guide-the sheets to a-pa1r of suitable sheet-forwarding delivery rollers 24:

and 25.

In order that the sheets be positively released controlled from the time they are by the gripper fingers until they reach the 25, a series of rollers 26 is provided between which and therimpression the-surface of the impression cylin-v surface 12 the sheets are nipped. The rollers 24: and '26,- as shown, are mounted on suitable shafts journaled at their. opposite ends'in the members ofuarms 2,7 andw28 respectively, said arms being-adjustably' fixed site ends-in suitable. brackets 30. The roller 25 is mounted ona suitable shaft which is "ournaled at its oppositeends directl in th rackets 30.

gagedwith certainty by the stripper fingers 23,:suitable/Sheetlifters are provide In gtothe transverse rod 29 secured at its oppohat. they may be enrecesses 30 to accommodate the fingers 31.

.' lation to the aicis toward the axis of the cylinder, so that the surface, and the;

vinclusive, a series of fingers 31 is rigidly secured to a pair of transverse rods or bars the cylinder.

the bars 32 and 33 are both indicated in Fig. 11. The cams 38 are prefgages 18 and project forwardly under the sheets in such a position that when the grippers are opened to release the sheets, the ends of the pins 31 act to lift the forward edges of the sheets outwardly'with re lation to the impression surface-as shown in' Fig.- 7.- The member 12 is provided with against the fingers, said adjustment being e ected by the elasticity of the paper and the buckle therein. The outer rearwardly bent ends 31 of the fingers 31 are thenpermitted to close upon and grip the forward edges ,of the sheets by the eccentric portion 42 of the cam, and the fingers are permitted to remain in this position by the low concentric portion 45 of the cam, so as to hold the sheets and carry them past the printing member to the point of delivery. The sheets are released and the fingers 31 are moved back to: their inoperative position by the eccentric portion 43 of the cam, said fingers being held in that position b the high concentric portion 46. It will he seen that in this construction there is a fixed relation between the vsheet-adjusting and sheet holding devices, and further that the sheet-adjusting devices are moved in the path of the sheets and relatively to the sheet-carrying member to adjust the sheets, and that the sheet-holding or gripping devices, as they are brought into contact with the sheets move at right angles to the path of motion of the latter so that there can be no lost motion or slipping of the sheets due to the action of the grippin surfaces.

For the purpose 0 preventing the edges of the sheets from slipping inwardly along the inner surfaces of the fingers 31, recesses 34 are preferably provided in the forward edge of the impression surface in position In accordance with the embodiment of my invention illustrated in Figs. 8 to 13 32 and 33, and these bars are provided at their outer ends with suitable friction rollers, which are adapted to slide in the cam grooves 35 formed in the opposite ends of The movement of the bars 32 and 33, together with the fingers 31, is controlled by a pair of links 36, which are pivoted at their outer ends to the opposite ends of the bar 33 and are bifurcated at their inner ends to embrace and be guided by the shaft of the impression cylinder 1, said links being provided with stud rollers 37, adapted to engage the cams 38 fixed to the frame 2 in alsuitable position with reof the cylinder. As shown, the bars 32 and 33 are impelled inwardly stud rollers 37 are held in c nstant engagement with the cam 38, by ns of a spring 39. The cam grooves 35 are substantially radial at their inner portions and are curved forwardly at their outer ends, as shown. It follows from this construction that when in engagement with the inner ends of the slots 35, the fingers 31 will move in a radial direction with relation to the impression cylinder, and when the bars 32 and 33 are moved outwardly, the upper bar 32 will pass into the curved portion of the slot 35 and the fingers 31 will move away from the forward edge of the im ression surface back into the gripper gap 0 th their operative position. The edges of the sheets are revented from slipping outwardly off the ends of the guide fingers 31 by the rearwardly bent ends 31 of the latter. The operation of the machine having been fully described in connection with thedescription of the construction thereof, no further description 'of the operation will be necessary to a complete understanding of the invention.

y invention, in 'its broader aspects, is not limited to the precise construction shown nor to the e impression cylinder, as

erably provided vwith threeueccentric portions 41, 42, 43, and three concentric por-. tions 44, 45 and 46. Y The eccentric. portion 41 acts to bringjthefingers 31 into position against the forWardedge of the impression cam is so adjusted that thls operation ta es. place at such time after the forward edge hat the impression surface has passed the guides 9 and 10 that a bend or buckle will be formed in the sheets, the latter being fed to the impression surface with their forward edges 3, suitable dis-. tanee in advance of the forward edge of" the impression surface. This position of the fingers 31fis..illustrated in Fig. 12. The fingers are preferably retained in this position for a short-time by the concentric portion 44 of the cam to allow the forward edges of the sheets time to be adjusted chan es other than those herein suggested may bemade in such construction without departing from the main principles of the invention and without sacrificing-the chief advantages thereof.

at I claim as new anddesire to secure by Letters Patent, is: 1; In a-device for presenting sheets to a moving sheet carrying member the combia sheet gripper, and a sheet positioning devioe moving with said gripper, said gripper and said "positioning device traveling with and while so traveling having a movement relativelv to said sheet carrying member for adjusting the sheets upon the member.

to receive the fingers 31 when they are in precise construction by which it maybe carried into effect, as many 1 nation with the sheet carrying member, of

' adjusting means for advancing the sheet to said member at substantially the same speed as that of the member, a sheet gripper, and a sheet positioning device moving with said gripper, said gripper and said positioning device traveling with and while so traveling having a movement relatively to "said sheet carrying member for adjusting the sheets upon the member.

4. In a device for presenting sheets to a moving sheet carrying member the combination with the sheet carrying member, of a sheet gripper and an abutment or gage carried by said gripper, said gripper and gage traveling with and while so traveling having a movement relatively to said. sheet carrying, ,member upon the member.

5. In a device for presenting sheets to a moving sheet carrying member the combination with the sheet carrying member, of means for advancing the sheets to said member, a sheet gripper carried by said member, an abutment or gage carried by said gripper, and means for giving said gripper and gage a movement relatively to said sheet carrying member for adjusting the sheets upon the member while the latter is in motion.

6. In a devicefor presenting sheets to a moving sheet carrying member the combination with the sheet carrying member, of

means for advancing the sheets to said member, at substantially the same speed as that of the member, a sheet gripper carried by said member, an abutment or gage carried by said gripper, and means for giving said gripper and gage a backward movement relatively to said sheet carrying member for adjusting the sheets upon the member while the latter is in motion.

for adjusting the sheets 7. In a device for presenting rotary sheet carrying member the comb nation with a rotary member, of feed wil ers for advancing the'sheets to said member at substantially the same speed as that of the member, a sheet gripper carried by said member, anabutment or gage carried by said gripper, and means forgiving said abutment or gage a backward movement relatively to .said rotary' m'ember for adjusting the sheets upon the member while the latter is in motion.

8. In a device for presenting sheets to a moving-sheet carrying member the combination with the sheet carrying member, of a combined sheet gripper and gage, and means for moving said gripper and gage in the path of the sheets and' re'latively to said sheet carrying member to adjustthe sheets on the member while thelatter is in motion and transversely to the path of the sheets to grip them and hold them in their adj usted position. 1

9. In a press for printing sheets, the combination with a me ber having an impression surface, of means for advancing the sheets to said member while the latter is in motion, said sheets being presented with their edges overlapping the forward edge of the impression surface, a combined sheet gripper and gage, and means for moving said gripper and gage toward the forward edge of the impression surface to adjust the sheets upon the impression surface while the said member is in motion and transversely to the path of the sheets to grip them and hold them in their adjusted position. a

10. In aprinting press. the combmat1on "with an impression cylinder having a plurality of recesses at' the forwardedge of the impression surface, of a gage consisting of a plurality of fingers adapted to enter the said recesses, and means for moving the said fingers rearwardly and forwardly with relation to the impression surface into and out of operative position in said recesses, substantially as described.

In testimony'whereof, I have signed my name to this specification, in of two subscribing witnesses. GEORGE E. PANCOAS'I. Witnesses;

HERMAN W. EISENHARDT, WILLIAM II. Banzs'rr.

the presence sheets to a 7

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