US1105964A - Printing-press. - Google Patents

Description

G. R. CORNWALL.

PRINTING PRESS.

APPLICATION TILED JULY 5, 1907.

Patented Aug. 4, 1914.

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[nnw/a' By 1 1 [1121 9305 Aug E QMZ%J G. R. GORNWALL.

PRINTING PRES.

APPLIOATIOH Hum JUL! 5, 1901.

1,105,964. I Patented Aug.4,1914.

5 BEBE-THEE 2.

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Patented Aug. 4, 1914.

6 SHEETS-SHEET 3.

G. R. CORNWALL.

PRINTING PRESS.

, nrucnron mum JULY 5. 1901. 1,105,964.

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an 3 av 3 Mil/ 25595 HIHHHIIIIIHIIIIIIIEIIIIIIlllllllllllllllllllllil G. R. CORNWALL.

PRINTING PRESS.

LPPLIOATIOH I ILED JULY 5, 1007.

1,105,964. Patented Aug. 4, 1914.

5 SHEETS-SHEET 4.

..... P I m1 3}! m G. R. CORNWALL.

PRINTING PRESS. APPLICATION FILED JULYB, 1907.

1,105,964, Patented Aug. 4, 1914.

, I 5 SHEETS-SHEET 5. f JJ y g 9 Ana/y UNITED STATES PATENT OFFICE.

GEORGE R. CORNWALL, OF RYE, NEW YORK, ASSIGNOB '10 AMERICAN PLANOGRAPH COMPANY, A CORPORATION OF WEST VIRGINIA.

PRINTING-PRESS.

To all whom it may concern:

Be it known that I, GEORGE R. ConNwALL, a citizen of the United States, and a resident of Rye, county of \Vestchester, and State of New York, have invented certain-new and useful Improvements in Printing-Presses, of which the following is a specification.

The invention relates to printing presses and more especially to rotary presses printing by offset. i

Objects of the invention are to provide a press for printing upon both sides of the mpression-receiving material by an offset 1mpression; to provide a press which shall be compact and conven1ent; to provide means for protecting the printing surfaces from injury by failure of the impression-receiving material, or otherwise; to provide means for controlling the impression and the action of the inking mechanism both automaticall v and manually; to provide a press which may be simply and expeditiously set to print either a single or perfecting impression; to provide for adjustment and arrangement of the different parts so that the press may be conveniently and advantageously run for different purposes; to provide the press structures of great usefulness and convenience: to provide for getting up color upon the plates upon the form cylinder or upon the offset surfaces either separately or simultaneously; and to provide-for moving and arranging the press elements so as to perform the different functions with little or no disturbance or arrangement of other elements. These and other objects of invention will in part be obvious and will in part more fully appear herein.

The invention consists in the novel parts, arrangements. constructions, combinations. and improvements herein shown and described.

The accompanying drawings, referred to herein and forming a part hereof, illustrate one embodiment of the invention. the same serving in con nection with the description herein to explain the principles of the in-, vention.

If the drawings: Figure 1 is an elevation of a press constructed in part in accordance with the principles of the invention; Fig. 2 is a view corresponding to one half of Fig. l with the press frame and certain, other parts removed for clearness; Fig. 3 is a fragmentary view in elevation of portions of the Specification of Letters Patent.

Application filed July 5, 1907.

Patented Aug. 4, 1914.

Serial No. 382,174.

control mechanism; Fig. 4 is a fragmentary elevation of a form cylinder and its inking system with the control therefor; and Figs. 5 and 6 are views, partly diagrammatic, showing different positions of some of the press elements.

The embodiment of the invention illustrated in the accompanying drawings by way of example, shows a press in which two ofi'set cylinders, designated as l and 2, are arranged to form a printing couple. A p111- rality of form cylinders are also provided in the said embodiment and are shown herein as two in number, indicated respectively by the reference numerals 3 and 4. The said parts are constructed and arranged so that one of the offset cylinders forming the printing couple receives a design from one of the form cylinders and the other offset cylinder receives a design from the other form cylinder. In the illustrated embodiment the offset cylinder 1 receives a design from form cylinder 3 and offset cylinder 2 receives a design from form cylinder 4. It will be understood that the said parts, together with the other parts of the press, are mountedin a frame in suitable cooperative relation with each other. The form of press frame hereinshown is indicated generally by the reference numeral 5.

According to certain features of the invention it is contemplated to separate the offset cylinders to throw off the impression without separating either of said offset cylinders from itsform cylinder. According to certain features of the invention this may be effected by moving one of the cylinders only, but according to other features thereof it is contemplated to move both of said cylinders and the particular form of means shown herein acts to move both offset cylinders away from impression. According to certain features of the invention automatic means of the kind indicated are contemplated. Furthermore, the invention in some of its aspects contemplates automatically controlling the impression throw-off from the impression-receiving material as well as leaving such means free for operation by the attendant.

In the present embodiment, and having in mind the features of the invention herein- .before specified, together with other feaalso means for yieldingly holdlng the cylinders to position. In the illustrated embodiment the said means act directly upon the swinging frame 6 and comprise spiral springs 7 working between the swinging frame 6 and a suitable part of the press frame 5. A turning head 8 threaded upon a stud mounted in the swinging frame 6 is shown for regulating the pressure of the springs7. The position of the offset cylinder with respect to the other offset cylinder is determined by a turning head 9 mounted upon the swinging frame 6 and working against a suitable face on the press frame 5. The particular form of means for separating the offset cylinders against the pressure of their springs 7 shown herein comprises a segmental rack 10 upon each of the swinging frames 6 and two intermediate geared sectors 11 and 12 meshing with each other and one engaging with one rack 10 and the other with the other rack 10. Fixed upon the shaft 13, upon which the geared sector 12 is fixed, there is shown an arm 14 connected by a pivoted link 15 to an arm 16 fixed to a sleeve 17 rotatably mounted upon a shaft 18. Fixed to the sleeve 17 is an arm 19. In operative relation with the free end of the arm 19 is a cam 20 mounted upon a shaft 21. The said parts are so constructed, arranged and proportioned that the cam 20 will rock the arm 19 and, through the train of mechanism just described, will rotate the sectors 11 and 12 which acting through the racks 10 will swing the frame 6 in opposite directions thus separating the offset cylinders 1 and 2 from each other. As the movement of the cam 20 continues the arm 19 will rock in the oppositeflirection and the frames 6 will be allowed to approach each other until the cylinders 2 are finally positioned by means of the springs 7 and turning heads 9. In this embodiment also the cam 20 is so shaped that at such time it is out of contact with the arm 19.

As hereinbefore indicated, suitable means for supplying impression-receiving material are provided, and the embodied form of such means is adapted for feeding a web through the press. The said illustrated form comprises the two offset cylinders and feed rolls 22 driven in a suitable manner as by gear trains to the form cylinders. The said rolls are mounted upon arms 23. Fixed with reference to the arm 23 is shown an arm 24 connected by a link 25 to an a m 26 upon the shaft 13. It will be seen, therefore, that in the present embodiment the feed rolls will be thrown off and on with the impres- S1011.

According to certain features of the invention, and as hereinbefore explained, the throw-ofl' mechanism for the impression is controlled by the impression-receiving material and in the illustrated embodiment a form of means for effecting this is shown. The throw-off mechanism is also capable of actuation by the press operator. A paper roll 27 is shown suitably mounted upon the press frame, the web being guided by suitable rolls between the printing cylinders 1 and 2 and the feed rolls 22. A turning bar 28 is shown for the purpose of giving a side delivery. A series of rolls 29 bear upon the web on one side thereof' and opposite to a roll or series of rolls 30 before the web passes between the offset cylinders. As shown herein the said rolls form part of an electrical circuit comprising a suitable source of energy such as a'battery 31. Between the detector rolls 29 and 30 and the shaft 21 suitable control devices are provided. The said control devices are designed in the present embodiment for calling the shaft 21 into rotation. There is, in the illustrated form of such means, loosely mounted upon the shaft 21 a driven gear 32 with which cooperates a clutch 33 which clutch is provided with suitable shoes 34 for engaging a ring fixed with reference to the gear 32. The shoes 34 are mounted upon levers 36 having a toggle action, the said levers being pivoted to a sliding collar 37. The collar 37 is connected by a rod 38 within the shaft 21 to an external collar 39. (lo-acting with the collar 39 is a forked lever 40 suitably pivoted upon the machine frame. Located adjacent to the lever 40 is a latch wheel 41 which is shown provided with three latches 42. The said latches are shown yieldable transversely to the plane of the latch wheel 41 but fixed circumferentially and in the plane of the said wheel. Each of the said latches is so shaped that when it encounters the lever 40 it will first have a camming ac tion upon the lever to rock it upon its pivot and after the lever is rocked to be in turn held by the lever. Suitably located with reference to the latches 42 is a trip 43 designed to be controlled from the web.

In the present embodiment the controlling device comprises a magnet 44 in circuit with the rolls 29, 30 and the battery 31. When the magnet 44 is energized it rocks the trip 43 on its pivot and the latch 42 then in position is swung clear of the lever 40 so that the clutch 33 will drive the shaft 21 from the gear 32. A suitable spring 45 is utilized to actuate the clutch when not restrained by the lever 40. Suitable means are provided for the purpose of deenergizing the magnet 44 so as to permit the trip 43 and springimpelled latch 42 to return to engaging position. In the illustrated form the disk 92 of non-conducting material is shown carried upon the shaft 21, said disk carrying a contact piece 93. lVhen the parts are in position for the feeding of the web through the press the contact piece 93 rests between the contact fingers 94 which are in the electrical circuit which controls the magnet 44.

It is contemplated by certain features of the invention to have the impression throwoil' and the throw-off for the impression-receiving material feeding means operable by the press operator. In the present embodiment, therefore, a form of means for efl'ecting this is provided. The form of said means comprises a trip 46 coiiperating with the latches 42 and connected by a springpressed, pivoted rod 47 to a foot lever or pedal 48. The rod 47 is connected with lever 48 by a spring hook 49 which at a suitable position of the parts arcs free from the lever 48 and allows the return of pedal 48 to its tripping position, the spring 50 then serving to return the trip 46 to its normal position independent of further movement of the pedal 48. The pedal 48 is also returned to position by suitable means, .such as a spring.

Suitable devices are provided for controlling the ink rolls and according .to certain features of the invention it is contemplated to provide means for throwing off the ink rolls simultaneously with the throwing-off of the impression or for allowing the ink rolls to remain in contact with the forms when the impression is thrown off. There is also provided in the present embodiment means for throwing off the ink rolls by hand independently of the other mechanisms for controlling the ink and a form of such means will be described herein.

The form of means for throwing ofl? the ink rolls from the form cylinders shown in connection with the present embodiment comprises a cam 51 fixed upon the shaft 21. In operative relation with the cam 51 is shown a lever 52 fixed upon a rock shaft 64 suitably mounted in the frame of the machine. Fast to the shaft 64 is an arm 65 and connected thereto is a pivoted link 53 which also connects to a bell crank 54. The bell crank 54 is connected b'ya pivoted link 55 to a lever 56. The lever 56 is connected to toggles 57. The toggles 57 are connected to the ink roll supporting carriage 58 which slides in guides 59 upon the press frame. As the toggles are broken and made the carriage 58 moves down and up and the ink rolls 60 aremoved into and out of contact with the form cylinder 4.

In the present embodiment there are two ink roll supporting carriages 58 shown associated with each form cylinder and each of these is provided with suitable toggles 57. A pivoted link 66 and crank arms 67 are shown for the purpose ofconnecting the toggles 57 so that the ink rolls for a given cylinder ma be lifted or dropped together when desired. It will be understood also that the opposite end of the press is supplied with substantially similar mechanism which need not be described in detail. In the present embodiment the connection between link 53 and bell crank 54 is shown as comprising a slot in the end of the rod 53 and a pin 61 in the corresponding end of the bell crank 54. A pin 62 normally confines the pin 61 to one end of the slot in the link 53 so that the link 53 and bell crank 54 move together. Upon removing the pin 62 the link 53 will move without moving the bell crank 54. It will thus be seen that a form of means is provided for throwing the ink rolls on and oil with the impression or for rendering these two movements independent of each other. As hereinbefore stated, a form of mechanism is rovided for throwing off and on the ink rol s independently from the mechanisms just described, and the illustrated form comprises a latch lever 69 fixed to a rock shaft 68 to which also are fixed the bell cranks 54. It will be understood that by removing the pins 62 the ink rolls may be thrown on and ofl by means of the latch lever 69. The link 70 is shown extending to the corresponding ink-controlling mechanism upon the other end of the machine for coiiperating with the other form cylinder. As the said mechanism may be substantially identical with that just described, detailed description thereof will be unnecessary.

It is contemplated by the invention in certain of its as ects to provide means for separating an 0 set cylinder and its form cylinder and a form of such means is shown as a part of the embodiment illustrated herewith. In the said illustrated form the offset cylinder is mounted slidably in the swinging frame 6, a particular form of such mounting comprising a journal box 71 mounted to slide on ways 72 in the frame 6. The said box is held to position by the spring 73 and the position of the cylinder is adjustably determined by a turning head 74 acting between the journal box 71 and the frame 6. It will thus be seen that a yielding adjustable mounting is provided and that the offset cylinder may be moved to and away from its form cylinder. Suitable devices for moving the offset cylinder away from its form cylinder against springs 73 are provided. The form of such mechanism illustrated comprises toggle levers 75 pivoted to the frame 6 and to the sliding journal boxes 71. Pivoted to the said toggle levers is a link 76 connecting to'a bell crank lever 77. The connection between the link 76 and lever 77 is shown as a pin-and-slot connection (see especially Fig. 2 of the drawings) in order that the throw-off for the offset cylinders may operate without separatin either offset cylinder from its form cylinder. A pivoted link 78 connects the said lever with an arm 79 fixed upon the shaft 18. A second arm 80 is also fixed upon the said shaft and its free end is in operative relation to a cam 81 upon the shaft 21. The other offset cylinder is shown mounted in a substantially similar manner and having practically similar connections. Additional connections comprising a bell crank lever 82, link 83 and an arm 84 completing the train to the shaft 18 are shown.

Suitable driving mechanism for the entire press is provided which may be any suitable or convenient form. There is shown in connection with the present embodiment, however, fast and loose belt pulleys 85 mounted on a shaft 86. A spur pinion 87 is mounted on an arm 88 mounted on the shaft 86. The said spur pinion 87 is also mounted on an arm 89 which swings concentrically with the offset cylinder 2. It will thus be seen that there is driving connection between the shaft 80 and the printing cylinders at all times notwithstanding any movement of the printing cylinder for throwing off the impression or for separating the offset cylinder and its form cylinder.

Any suitable gear trains for driving the different parts of the press may be provided and no detailed description thereof will be necessary. In the present embodiment the spur gearing on the two form cylinders and two printing cylinders intermesh from one to the other so that thev may be driven in exact relation to each other. A suitable belt shifter 90 is provided for shifting the belt from one pulley to the other. The press may be one adapted for carrying planographic printing plates and in such case suitable damping mechanism will be used. Damping mechanisms 91 are accordingly shown herein but need not be described in detail, as the form thereof constitutes no part of the present invention.

The manner of operation of the hereindescribed mechanism is substantially as follows: The press may be considered for convenience as having the web running from the roll 27 past the detector rolls 29 and 30, past suitable guide rolls, between the offset cylindcrs 1 and 2, between the feed rolls 22 and over the turning bar 28. Should any defect occur in the paper the rolls 29 and 30 would serve to close the circuit and thus energize the magnet 44 which, acting upon the trip 43,

would rock the latch 42 free from the lever 40. The spring 45 would then permit the clutch to engage the pinion 32 thus bringing the shaft 21 into rotation. The movement of cam 20 acting on lever arm 19 and therethrough upon arm 16, link 15 and arm 14. This will cause the sectors 11 and 12 to rotate and, acting through the racks 10, to swing the frames 6 against the spring 7 so as to slightly separate the cylinders 1 and 2. At the same time the arm 26, fixed upon the shaft 13, is actuated and through the lever 25 and arm 24 slightly separates the feed rolls 22 and the feed of the web is stopped. Should the operator desire to trip the prem he can do so by means of the foot lever 48 which, acting through the spring hook 49 and sliding rod 50, would operate the trip 46 which would co-act with the latch 42 in the manner already described in connection with the trip 43. It will be understood that when the next latch 42 encounters the lever 40 it will first serve to cam the lever 40 so that it swings on its pivot so as to throw out the clutch 33. While the foregoing action is tak ing place the cam 51 has acted upon the lever 52 to throw off the inking mechanisms from the form cylinders 3 and 4 by means of the trains of mechanism for that purpose hereinbefore described.

Should it be desired to separate the offset cylinders from their form cylinders this may be effected through the mechanism provided for this purpose. By tripping the foot lever 48 the second latch 42 may be released from the lever 40 and the shaft 21 again called into action. The cam 81 now causing the arm 80, and the arm 79 which is fixed relatively to the arm 80, to act through the link 78, bell crank 77, and link 76, to make the toggles 7 5, thus sliding the journal boxes 71, carrying the offset cylinders, against the springs 73 and away from the form cylinder. It will be understood that when the latch 42 comes into operative relation with the lever 40 the clutch 33 will be again thrown out and the shaft 21 come to rest. leaving the cylinders in the position described. If this latch 42 be moved away from the lever 40 the shaft 21 would be again caused to rotate, the cam 81 will permit the lever arm 80 to resume its former position and acting through the train of mechanism described it will break the toggles 75 and the offset cylinder will again assume operative position with reference to its form cylinder. The cam 51 will also permit the lever 52 to assume its former position and through the trains of mechanism described the ink rolls will be again brought into contact with their form cylinders. The cam 20 will also rotate so as to pass out of engagement with the lever 19 and the two printing cylinders will be brought to the printing position with reference to each other, and the feed rolls 22 will also be brought in contact with the web. The manual control of the ink rolls by the lever 69 will be understood from the description.

It will be understood that should it be desired to use the inking mechanism while vided which realizes the objects of invention and the advantages herein set forth, to-

; gether with other objects and advantages.

The invention. in its broader aspects, is not limited to the particular constructions shown. nor to any particular constructions by which it has been or may be carried into effect, as many changes may be made in the construction without departing from the main principles of the invention and without sacrificing its chief advantages.

What I do claim as my invention and desire to secure by Letters Patent, is:

1. A printing press including in combination a plurality of planographic form cylinders, two offset cylinders constructed and arranged to form a printing couple and so that one of said ofl'set cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder and a single mechanism connected to each end of one of said offset cylinders for moving said offset cylinder away from impression with respect to the other offset cylinder Without separating it from its form cylinder.

2. A printing press including in combination a plurality of form cylinders, two ofl'set cylinders constructed and arrange to form a printing couple and so that one of said ofl'sct cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder. and automatic means for moving an offset cylinder away from impression with respect to the other offset cylinder without separating it from its form cylinder.

3. A printing press including in combination a plurality of form cylinders, two 011"- set cylinders constructed and arranged to form a printing couple and so that one of said ofl'set cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from an other form cylinder, means for feeding an impression-receiving material between the form cylinders, and means controlled by the impression-receiving material for moving an offset cylinder away from impression with respect to the other offset cylinder with out separatingit from its form cylinder.

offset cylinders constructed and arranged to form a rintin couple and so that one of said 0 set cy inders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder, and means for simultaneously movin each of the said offset cylinders away roin impression without separating an offset cylinder from its form cylinder.

5. A printing press including in combination a plurality of form cylinders, two offset cylinders constructed and arranged to form a printing couple and so that one of said offset cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder, means for feedlng an impression-receiving material between the form cylinders, and means controlled by the impression-receiving material for simultaneously moving each of the said offset cylinders away from impression without separating an offset cylinder from its form cylinder.

6. A printing press including in combination a plurality of planographic form cylinders, ink rolls for each form cylinder, two

offset cylinders constructed and arranged to form a printing couple and so that one of said offset cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder, and a single mechanism connected to both ends of an offset cylinder for moving an offset cylinder away from impression with respect to the other offset cylinder without separating it from its form cylinder and for throwing oil the ink rol-ls from the form cylinder.

7. A printing press including in combination a plurality of form cylinders, ink rolls for each form cylinder, two ofli'set cylinders constructed and arranged to form a printing couple and so that one of said offset cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder,

' and means for moving an ofi'set cylinder away from impression with respect to the other offset cylinder without separating it from its form cylinder and for simultane ously throwing off the ink rolls from the form cylinder.

8. A printing press including in combina-' tion a plurality of form cylinders, ink rolls for each form cylinder, two offset cylinders constructed and arranged to constitute a printing couple, means for feeding an impression-receiving material between the offset cylinders. and means controlled by the impression-receiving material for throwing oh. the impression while permitting each ofi'set cylinder to remain in contact with its form cylinder and for throwing off the ink rolls from the form cylinder.

9. A printing press including in combination a plurality of form cylinders, two offset cylinders constructed and arranged to form a printing couple and so that one of said ofiset cylinders receives a design from one of the form cylinders and the other ofi'set cylinder receives a design from another form cylinder, means for feeding an impressionreceiving material between the form cylinders, means for moving an offset cylinder away from impression with respect to the other ofi'set cylinder without disturbing its relation to the form cylinder, and means for simultaneously stopping the feed of the impression-receiving material.

10. A printing press including in combination a plurality of form cylinders, two ofi'set cylinders constructed and arranged to form a printing couple and so that one of said ofi'set cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder, means for feeding an impression-receiving material between the form cylinders, a single mechanism connected to both ends of an offset cylinder for moving said ofi'set cylinder away from impression with respect to the other ofi'set cylinder without disturbing its relation to the form cylinder, and means controlled by the operator for stopping the feed of the impression-receivin'g material.

11. A printing press including in combination a plurality of form cylinders, two offset cylinders constructed and arranged to form a printing couple and so that one of said ofi'set cylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another of the form cylinders, automatic means for separating the offset cylinders, and other means for separating an ofl'set cylinder from its form cylinder.

12. A printing press including in combination a plurality of form cylinders, two ofi'set cylinders constructed and arranged to form a printin couple and so that one of said ofl'set cylinders receives a design from one of the form cylinders and the other oil'set cylinder receives a design from another of the form cylinders, automatic means for separating the ofi'set cylinders, and other means controlled by the operator for separating an offset cylinder from its form cylinder.

13. A printin press including in combination a plurality of form cylinders, two ofi'set cylinders constructed and arranged to form a printing couple and so that one of said ofl'set cylinders receives a design from one of the form cylinders and the other ofi'set cylinder receives a design from another of the form cylinders, automatic means for separating the oflset cylinders, and means controlled by the operator for separating the offset cylinders without separating each ofi'set cylinder from its form cylinder.

14. A printing press including in combination two form cylinders, a hanger supporting an offset cylinder, said hanger being angularly movable concentrically with one of the said form cylinders, a hanger supporting a second offset cylinder, said hanger being angularly movable concentrlcally with the other of said form cylinders, and means for holding the said offset cylinders to each other to form a printing couple.

15. A printing press including in combination two form cylinders, a hanger supporting an oflset cylinder, said hanger being angularly movable concentric-ally with one of the said form'cylinders, a hanger supporting a second ofl'set cylinder, said hanger being angularly movable concentrically with the other of said form cylinders, means for holding the said oflset cylinders to each other to form a printing couple, and means for regulating the amount of pressure between the ofi'set cylinders.

16. A printing press including in combination two form cylinders, a hanger supporting an offset cylinder, said hanger being angularly movable concentrically with one of the said form cylinders, a hanger supporting a second ofi'set cylinder, said hanger being angularly movable concentrically with the other of said form cylinders, and means for yieldingly holding the said ofi'set cylinders to each other to form a printing couple.

17. A printing press including in combination a form cylinder, a hanger supporting an offset cylinder, said hanger being movable angularly concentrically with the form cylinder, means for movingthe form cylinder and offset cylinder radially away from each other and connections for actuating said means.

18. A printing press including in combination a form cylinder, a hanger supporting an offset cylinder, said hanger being movable angularly concentrically with the form cylinder, said ofi'set cylinder being slidably mounted on said hanger, means for moving the offset cylinder on its mounting whereby the form cylinder and ofi'set cylinder pass out of impression contact and connections for actuating said means.

19. A printing press including in combination a form cylinder, a hanger supporting an ofl'set cylinder, said hanger being movable angularly concentrically with the form cylinder, means for radially separating the form cylinder and offset cylinder, means for angularly moving the said hanger and actuating connections for each of said means. V

20. A printing press including in combination a form cylinder, inking rolls therefor, an offset cylinder constructed and arranged to receive a design from said form cylinder a member constituting with the offset cylinder a printing couple, means for simultaneously throwing off the impression and for throwing off the inking rolls from the form cylinder, and means for also throwing off the impression between the offset cylinder and its form cylinder if desired.

21. A printing press including in combination a form cylinder, inking rolls therefor, an offset cylinder constructed and arranged to receive a design from said form cylinder, a member constituting with the offset cylinder a printing couple, and automatic means for simultaneously throwing off the impression and for throwing off the inking rolls from the form cylinder, and means for also throwing off the impression between the offset cylinder and its form cylinder as desired.

22. A printing press including in combination a form cylinder, an offset cylinder in impression contact therewith, a member actin" as an impression member for said offset cylinder, and means for moving the offset cylinderin one direction to throw off the impression between the offset cylinder and said impression member and means for moving the offset cylinder-in another direction for throwing off the impression between it and the form cylinder.

23. A printing press including in combination a plurality of planographic form cylinders, two offset cylinders constructed and arranged to form a printing couple and so that one of said offsetcylinders receives a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder, and single mechanism acting at both ends of said offset cylinder to move said offset cylinderaway' from impression with respect to the other offset cylinder withoutseparating it from its form cylinder.

2- A printing press including in combination a plurality of planographic form cylinders, ink rolls for each form cylinder, two

' offset cylinders constructed and arranged to form a printing couple and so that one of said offset cylinders receives 'a design from one of the form cylinders and the other offset cylinder receives a design from another form cylinder, and single mechanism acting at both ends of said offset cylinder to move said offset cylinder away from impression with respect to the other offset cylinder without separating it from its form 25. A printing press including in combination two form cylinders, two offset cylinders supported to swing concentrically with said respective form cylinders each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means forcing said offset cylinders away from the vertical and toward each other to bring them into contact with an impression material passing therebetween.

2?). A printing press including in combination two form cylinders, two offset cylinders supported to swing concentrically with said respective form cylinders each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means forcing said offset cylinders away from the vertical and toward each other to bring them. into contact with an impression material passing therebetween, and means for positively moving said cylinders away from each other to throw off the impression.

27. A printing press including in combination two form cylinders, two offset cylinders supported to swing beneath concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means forcing said offset cylinders away from the vertical and toward each other to bring them into.contact with an impression material passing therebetween.

28. A printing press including in combination two form cylinders, two. offset cylinders supported to swing concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means yieldingly forcing said offset cylinders away from the vertical and toward each other to bring them into contact with an impression material passing therebetween.

29. A printing press including in combination two form cylinders, two ofiset cylinders supported to swing beneath concentrically with said respective form cylinders, each offset cylinder being printed 011 by the form cylinder with which it is concentrically mounted, means yieldingly forcing said offset cylinders away from the vertical and toward each other to bring them into contact with an itnpressirn material passing therebetween.

30. A printing press including in combination two form cylinders, two offset cylinders supported to swing beneath concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means yieldingly forcing said offset cylinders away from the "ertical and toward each other to bring them into contact ith an impression material passing therewt \Tcn. and means for positively moving 1. ti cylinders away from each other to throw off the impression.

31. A printing press including in combination two form cylinders, two offset cylin zltl'a supported to swing concentrically with said respective form cylinders, each oflset lindel' being printed on by the form cylinder with which it is concentrically mounted, means forcing said offset cylinders away from the vertical and toward each other to bring them into contact with an impression mutt-r m passing therebetween, means for supporting a roll of paper and means on the other side of said offset cylinders from said support for positively drawing the web through the press.

32. A printing press including in combination two form cylinders, two offset cylinders supported to swing beneath concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means forcing said offset cylinders away from the vertical and toward each other to bring them into contact with an impression material passing therebetween, means for supporting a roll of paper and means on the other side of said off set cylinders from said support for positively drawing the web through the press.

38. A printing press including in combination two form cylinders, two offset cylinders supported to swing beneath concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentricall mounted, means yieldingl forcing said off set cylinders away from tfie vertical and toward each other to bring them into contact with an impression material passing therebetween, means for supporting a roll of paper and means on the other side of said offset cylinders from said support for positively drawing the web through the press.

34. A printing press including in combination two form cylinders, two offset cylinders supported to swing beneath concentrically with said respective form cylinders, each offset cylinder being printed on b the form cylinder with which it is concentricall mounted, means yieldingly forcing said 0 set cylinders away from the vertical and toward each other to bring them into contact with an impression material passing therebetween, means automatically controlled by the impression receiving material, for throwing off the impression.

A printing press including in combination two form cylinders, two offset cylinders supported to swing concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentrically mounted,

means forcin said offset cylinders away from the vertical and toward each other to bring them into contact with an impression material passing therebetween, means automatically controlled by the impression receiving material to throw off the impression.

36. A printing press including in combination two form cylinders, two offset cylinders supported to swing concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means forcin said offset cylinders away from the vertlcal and toward each other to bring them into contact with an impression material passing therebetween, means for supporting a roll of paper, means on the other side of said offset cylinders from said support for positively drawing the web through the press, and means automatically actuated by the web for positively moving said cylinders away from impression.

37.- A printing press including in combination two form cylinders, offset cylinders supported to swing concentrically with sail respective form cylinders, each offset cylin-- der being printed on by the form cylinder with which it is concentrically mounted means forcing said offset cylinders away from the vertical and toward each other t) bring them into contact with an impressic material passing therebetween, and means for moving said offsetcylinders radially away from their respective form cylinders when said offset cylinders are moved awci from each other.

38. A printing pressv including in Combination two form cylinders, two offset cylin ders supported to swing beneath concentrically with said respective form cylinders,

each offset cylinder being printed on by the form cylinder with which it is concen-- trically mounted, means forcing said offset cylinders away from the vertical and to ward each other tobring them into contact with an impression material passin therebetween, and means for movin said offset cylinders radially awav from t eir respective form cylinders when said offset cylinders are moved away from each other.

39. A printing press including in combination two form cylinders, two offset cylinders supported to swing concentrically with said respective form cylinders, each offset cylinder being printed on by the form cylinder with which it is concentrically mounted, means forcing said offset cylinders away from the vertical and toward each other to bring them into cont-act with an impression material passing therebetween, and means for automatically moving said offset cylinders radially away from their respective form cylinders when said offset cylinders are moved away from each other.

40. A. printing press including in combination two form cylinders, two ofiset cylinders supported to swing beneath concentrically with said respective form cylinders, each ofi'set cylinder being printedon by the form cylinder with which it is concentrlcally mounted, means forcing said offset cylinders away from the vertical and toward each other to bring them into contact with an impression material passing therebetween, and means for automatically movin said offset cylinders radially away from t eir respect1ve form cylinders when said oifset cylinders are moved away from each other.

41. A printing press including in combination two form cylinders, two ofi'set cylinders each mounted to swing concentrically with one of said form cylinders, means for holding said oflset cylinders in impression contact with each other at a point above the lowermost point of their swing and auto- 2( GEORGE R. CORNWALL.

Witnesses:

JOHN D. MORGAN, CLARA PHILLIPS.

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