US1972470A

US1972470A - Offset printing press

Info

Publication number: US1972470A
Application number: US671451A
Authority: US
Inventors: Howard M Barber
Original assignee: Individual
Current assignee: CB Cottrell and Sons Co
Priority date: 1933-05-17
Filing date: 1933-05-17
Publication date: 1934-09-04
Anticipated expiration: 1951-09-04

Description

P 1934- H. M. BARBER 1,972,470

OFFSET PRINTING PRESS Filed May 17, 1933 11 Sheets-Sheet 1 INVENTOR 7%;4/2 M BY ATTORNEYS P 4, 1934. H. M. BARBER 1,972,470

OFFSET PRINTING PRESS Filed May 17, 1933 11 Sheets-Sheet 2 lNVENTOR ATTORNEYS OFFSET PRINTING PRESS Fi led May 17, 1953 11 Sheets-Sheet s INVENQTOR wd fwi W! M ATTORNEYS Sept. 4, 1934.

H. M. BARBER OFFSET PRINTING PRESS Filed May 1'7, 1933 11 Sheets-Sheet 4 ATTORNEYS P 1934- v H. M. BARBER 1,972,470

OFFSET PRINTING PRESS 11 Sheets-sheaf 5 Filed May l'?', 1933 176' 17 G o i 1 z i 17 t k w ATTORNEYS H. M. BARBER 1,972,470

OFFSET PRINTING PRESS Sept. 4, 1934.

' Filed May 17, 1933 11 Sheets-Sheet 6 10a A $179 I VENTOR ATTORNEYS Sept. 4, 1934.

H. M. BARBER OFFSET PRINTING PRESS Filed May 17, 1933 11 Sheets-Sheet 7 INVENTOR ATTORNEYS P 4, 1934- H. M. BARBER L 1,972,470

I OFFSET PRINTING PRESS I Filed May 17, 1933 11 Sheets-Sheet 8 INVENTOR ArgMW/Z 7 4w ATTORNEYS Sept. 4, 1934.

OFFSET PRINTING Filed May 17,

J9 J.9* a

H. M. BARBER \PRESS I INVENTOR ATTORNEYS P 4, 1934- H. M. BARBER 1,972,470

OFFSET PRINTING PRESS Filed May 1'7, 1933 1], Sheets-Sheet 10 INVE-NTOR ATTORNEYS p ,1934. H. M. BARBER 4 1,912,470

OFFSET PRINTING PRESS Filed May 17, 1933 11 Sheets-Sheet 11 4' AUX MOTOR CONTROL L Q 0" A v 5 0 mm Mo'roR comm. STATION J85 INVEN I'OR ATTORNEYS Patented Sept. 4, 1934 PATENT 'OFFlCE orrsnr PRINTING PRESS Howard M. Barber, Pawcatuck, Conn assignor to C. B. Cottrell & Sons Company, Westerly, R. I.,' a

corporation of Delaware Application May 17, 1933, SerialNo. 671,451

63 Claims. (01. 101-143) This invention is directed to that type of offset web printing presses in which the .printing unit includes interconnected ccacting design, transfer and impression cylinders and their inking mechanism, and with or without a moistening mechanism, said printing unit operating in unison with a suitable web advancing means, such for instance as a folder, delivery, feeder, or two or more combined.

This invention consists, generally, in a common drive for the web advancing means and the printing unit and a separate drive for the design and transfer cylinders, meansibeing provided for permitting the driving or stopping of the web advancing means and impression cylinderindependently of the design and transfer cylinders and for permitting the driving or stopping of the said design and transfer cylinders independently of the Web advancing means and impression cylinder. a

This invention consists, more particularly, in the provision of one motor for driving the printing unit and web advancing means or for driving the web advancing means and the impress sion cylinder of the printing unit and a second motor for driving the design and transfer cylinders independently of the impression cylinder and web advancing means, means being provided for bringing one motor into and the other motor out of operative connection with the de-.

sign and transfer cylinders.

This invention consists, still. more particularly, in means for separating the design and transfer cylinders without operaiively isconnecting them,

means for separating the transfer and impression cylinders without operatively disconnecting them, and means for operatively disconnecting the transfer and impression cylinders without cperatively disconnecting the impression cylinder- 4 o from the web advancing means.

The object of my invention is to provide an oiiset printing press of the above character whereby the press crews may work independently upon either the web advancing means and its 1.5 operatively connected impression cylinder when disconnected from the design and transfer cylinders, or independently, upon the 'designand transfer cylinders and their inking and moistening mechanisms. Thus the web may be threaded and advanced and brought into proper register with a folder, if one is employed, without stopping the design and transfer cylinders; also the design and transfer cylinders and the inking and moistening mechanisms may be'inde-' 5:5 pendently worked upon for various purposes, as

for applying a plate to the design cylinder or for preparing and adjusting the inking and mois-- tening mechanisms or for gumming the design cylinder, without affecting the running or stopping of the web advancing means and impression cylinder, thereby permitting the press crews to work on the independently operating parts at the same time and thus materially shorten the period consumed for bringing full printing condition.

A practical embodiment of my invention is represented in the accompanying drawings which illustrate a one color offset'web printing press.

Fig. 1 represents a detail top plan view of the printing press, the several coacting levers being omitted for sake of clarity.

Fig. 2 represents a, detail side viewof the press showing in diagram the printing unit, the web, and the web advancing means.

Fig. 3 represents a detail side View showing the gearing through which the web and the several cylinders are driven. h

Figs. 4 and.4a, represent a detailside elevation with the various control levers in their respective positions when the design, transfer and im pression cylinders are contacting and interconnected' and the press running-at full speed.

Figs. 5 and 5a represent a similar view showing the various control levers in their respective positions when the impression and transfer cylinder are separated and operatively disconnected; the design andtransfer cylinders being in contact and operatively connected and the inking and moistening mechanisms in contact with the design cylinder, to permit coactive movement of the design and transfer cylinders independently of the impression cylinder and web advancing means, and vice versa.

Figs. 6 and 6a represent a simi ar View showing the various control levers in their respective positions when the inking mechanism is out of contact with the design cylinder, the design cylinder out of contactwith the transfer cylinder, and the transfer cylinder out of contact and operatively disconnected from the impression cylinder. 1 I Figs. '7 and 8 represent in detail side elevation the press into its the ink feeding mechanism inits inoperative and operative positions, respectively.

Fig. 9 represents a detail vertical cross section on an enlargedscale, taken in the plane of the line IXIX of Fig. 1, looking in the direction of the arrows. J

Fig. 10 represents an enlarged central section through the magnetic clutch which controls the operative connection and disconnection of the transfer and impression cylinders.

Fig. 11 represents a detail side elevation on the same scale as Fig. 9 of the motor side of the press.

Fig. 12 represents a central section on the same scale as Fig. 10 of the magnetic clutch, for controlling the operative connection and disconnection between one of the drives and the design and transfer cylinders.

Fig. 13 represents a detail sideelevation with certain of the control levers removed, the remaining control levers being in the positions shown in Fig. 6.

Fig. 14 represents a detail section on an enlarged scale, showing the double yielding connection between one of the cam levers and its rocking lever.

Fig. 15 represents a section on an enlarged scale, showing the yielding connection between the latch bar and its lever which controls the ink feeding mechanism.

Fig. 16 represents a section on an enlarged scale of the yielding connection between the hook lever and its rock lever, controlled by, one of the eccentric bearings for the transfer cylinder.

Fig. 1'! represents the wiring diagram of the operating control for the various mechanisms.

The single color Web printing unit illustrated herein comprises interconnected coacting design, transfer and

impression cylinders

1, 2 and 3 respectively, and their shafts 4;, 5 and 6 respectively, said printing unit also including the inking and moistening mechanisms for the design cylinder 1. V

The inking mechanism comprises, generally, the ink fountain 7, the fountain roll 8, the fountain roll clutch 9, the ductor roll 10, the distributing rolls 11 and the design cylinder inking rolls 12. v

The moistening mechanism comprises, generally, the fountain 13, the fountain roll 13*, the ductor roll 14 and the design cylinder water applying rolls 15.

The web is denoted by 16 and it leads from its supply roll 17 to and around the impression cylinder 3 and from thence to a delivery which, in the present instance, is shown as a folder 18.

The web advancing means includes the folder 18 and also the web supply roll drive which is herein shown as an endless tape carrier 19 engaging the periphery of the web supply roll 1'! and passing around pulleys 20 and 21, interconnected by a train of

gears

22, 23, 24, 25 and 26.

Two motors are provided, one motor 2? being arranged to either drive the web advancing means and the printing unit or the web advancing means and impression cylinder independently of the remainder of the printing unit; and the other motor 28 being arranged to independently drive the said remainder of the printing unit, i. e.. the design and transfer cylinders and the inking and moistening mechanisms.

The drive from the main motor to the web advancing means, i. e., the folder and the web supply roll drive comprises the following e le-'- ments:

A gear 29 fast on the main motor shaft 30 drives a gear 31 fast on a cross shaft 32. A bevel gear 33 fast on the cross shaft 32 drives a bevel gear 34' fast on a longitudinally disposed shaft 85. A bevel gear "6 fast on the longitudinal shaft 35 drives a bevel gear 37 fast on an upright shaft 38 of the folder 18, from which shaft 38 the folder is driven in the usual manner. An

other bevel gear 39 fast on this longitudinal shaft 35 drives a bevel gear 40 fast on a cross shaft 41, which shaft has fast thereon a gear 42 which drives a gear 43 fast on a cross shaft 44, which shaft has in turn a gear 45 which drives a gear 46 on the shaft 47 of the belt pulley 20.

The drive from the main motor 27 to the shaft 6 of the impression cylinder 3 is as follows:

The cross shaft 32 which is driven from the motor shaft 30 through the

gears

29 and 31 has fast thereon a gear 48 which drives a gear 49 loosely mounted on a cross shaft 53. This loose gear 49 drives a gear 51 fast on the impression cylinder shaft 6.

The drive from the auxiliary motor 28 to the shaft 6 of the impression cylinder 3 is as follows:

The shaft 52 of the auxiliary motor drives a cross shaft-53 through a reduction gear unit 54, its shaft 55 and magnetic clutch 56. A gear 57 fast on the cross shaft 53 drives the gear 58 loosely mounted on the impression cylinder shaft 6.

A magnetic clutch 59 is provided for interlocking and releasing the fast gear 51 of the main motor drive and the loose gear. 58 of the auxiliary motor drive, both of which gears are on the impression cylinder shaft 6.

The drive from the impression cylinder shaft to the transfer and design cylinders and to the inking and moistening mechanisms for the de sign cylinder is as follows:

The loose gear 58-on the impre'ssion cylinder shaft 6 drives a gear 60 fast on the transfer cylinder shaft. 5. A gear 61 also fast on the transfer cylinder shaft 5 drives a gear 62 fast on the design cylinder shaft 4. This gear 62 also drives the gears 64 of the inking rollers and the gear 69 of the moistening mechanism. Another gear 65 fast on the design cylinder shaft 4 drives a gear 66 which in turn drives a gear ,6? fast on the shaft 68 of the ink fountain feed mechanism.

The means for operating the inking mechanism is as follows: v

' A cam 70 fast on the shaft 68 acts upon a spring pressed roller 71 carried by an arm 72 fast on a rock shaft '73. A manually adjustable connection '74 on the second arm '75 fast on the rock shaft '73 is provided for one end of a connecting bar 76, the other end of which bar is connected to an arm 77 of the rock shaft '73 of the fountain roll clutch 9, to cause the fountain roll 8 to rotate, step by step. A hand screw 79 is journaled in the arm and adjusts the connection '74 of the bar 76 to control the movement of the founsign cylinder on eccentric bearings 80, adjustable I.

rotatively by providing each bearing with an arm 81 from which a rod 82 extends to a stud 82*, fixed to the press frame where the rod may be screw threaded and provided with adjusting nuts 83 cooperating with the stud to move the rod longitudinally.

The transfer cylinder 2 may be adjusted to bring it out of printing contact with the impression cylinder for thickness of stock printed, without disturbing its printing contact with the design cylinder and the transfer cylinder may also be adjusted to bring it out of printing contact with the design cylinder when so desired. To accomplish these results the transfer to be nected to arms 91 projecting from theouter eccentric bearings 84.

An adjusting screw 92 is provided between the

members

89 and 90 of the connecting rod to reg-" ulate the printing contact between the transfer cylinder and impression cylinder. when in their printing position.

The transfer cylinder is adjusted to bring it out of contact with the designcylinder as well as the impression cylinder by providing each of the inner eccentric bearings 85 with an arm 93 connected to one end of a connecting rod 94, the other end of which rod 94 is connected to an arm 95 fast on a rock shaft 96, which shaft 96 is rocked from a cam 97 on the rotary shaft 53, through the following connections:

A spring pressed stud or roller 98 is carried by the arm 99 of a three armed leverpivoted at 100, a second arm 101 of said lever being yieldjiingly connected through a rod 102 with an arm 103 of a-lever pivoted at 104, the other arm 105 of which lever is connected through arod 106 with an arm 107 carried by'the rock shaft 96.

Means are provided for preventing the hand lever 86 from being rocked except under certain conditions to be hereinafter fully explained, which means are herein shown as comprising a lock bar 108 carried by one of the inner eccentric bearings 85 in position to engage one or the other of the "diametrically

opposed shoulders

109, 110, carried by the hand lever 86. r

The shaft 53 has alsofixed thereto a cam 111 operating a spring pressed roller 112, carried by one arm 113 of a rock lever pivoted at 114, the other arm 115 of which lever is connected to an operating bar 116 having

shoulders

117 and 119 adapted to respectively engage the

pins

118 and 120, carried by a rock lever 121 fast on the rock shaft 96. x

This operating bar 116 carries a spring pressed hook bar 122, the hook 123 of which is arranged to be brought into and out of .lockingengagement with a hook lever 124 of an arm 125 on which a spring pressed connecting bar 126 is mounted. The end of this bar 126 is connected to an uprising arm 127 of a three armed rock lever pivoted at 128. is arranged to engage the uprising arm 130 of the three armed rock lever pivoted at 100. The other arm 131 of the three armed lever pivoted at 128 is arranged in position to be engaged by a swinging latch lever 132 pivoted at 133, which latch lever is connected by a spring pressed rod 134 to the depending arm 135 of athree armed lever pivoted at 136, the arm 137 of which lever has a lost motion connection with the hand lever 36 through a rod 138 eccentrically connected to the hand lever 86. This rod 138 has an elongated slot 139 in which a pin 140'on the lever arm 137 travels. ,1 V

The uprising arm 141 of the said lever pivoted at 136 is connected by a spring pressed rod 142 with the uprising spring pressed arm-l43 of a rock lever pivoted at 144. Another arm 145 of this rock lever is connected through a rod 146 to A hook arm 129 of this rock lever an arm 147 of a rock lever pivoted at 148, the other arm 149 of which rock lever operates from the main motor clutch 59.

The rock-lever 121 has a spring pressed connection. at the pin 150. with.the-lower end of a hook bar.151 having at its upper'end two recesses 152, 1.53 arranged, respectively, to engage a 131111154011 2111 operating bar which isconnected at one end tothe depending arm 156 of a rock lever. pivoted at 157, the uprising arm 158 of which lever "carries a spring pressed roller 159'whioh rides onthe face of a'cam 160 fast on the shaft 4 of the design cylinder 1. a

The operating bar 155 has two

shoulders

161, 163, arranged to alternately engage the

pins

162, 164 of a rock levery fast on a rock shaft 166, which shaft also is provided with a depending arm..167 which is connectedbya rod 168 to'the depending arm 169 :of arock shaft 170. This rock shaft hasanzeccentric, 171 forming a support foreach end plate 172 01 the design'cylinder inking rollcarriage- I This end plate 172 .carries a pin. 173 for engagement with the lower end of latch bar 174, the upper end of which latch bar'hasa" spring pressed lost motion connection with an arm 175 fast to a rock shaft 176. This rock shaft 176 has fast thereonanotherlatchbar 177, arranged to be brought into and out of engagement with the rock arm 75, carried by the rock shaft 73, the motion of whichiscontrolled by the cam 73 on the shaft 68..., I I Q 7 Opposed .coil' springs 178, 179 (see Fig. 14) are arranged to connect the rod 102 to'itslever arm 103 with a yielding: lost: motion in both directions. 1

The yielding lostmotionconnection between the upper end of the latch bar 174 and the lever arm 175 (see Fig. 15) includes a plunger 182 and an expansion spring 183 yieldingly holding the plungeragainstthe pin 184. 1

The yielding lost'moticnconnection between the rock lever 121and thehook bar- 151 (see Fig. 16) includes .a plunger 189 and .an expansion spring 181 yieldingly holding-the plunger against .3;

noted by 200. The'handFOperat-ed trip magnet'i...

is denoted'by 204, the switch by- 203 and the plunger by 20.5. The main clutch magnetic relay is denoted by 206' andv its contacts by 297, 288. The main motor slow speed'relayis denoted by 209 and its contacts by 210,211 and 212. The

main in'otor high'speed rel-ayis denoted' by 213.

and its contacts by3214z- The hand operated switch to run the, Webaathigh or 'low speed when the impression cylinder is operatively disconnected from the design and transfer cylinders, is denoted'by 215. .Theauxiliary motor relay denoted by 216. is. provided with the contacts'217, 218,219; 220 and 221. The slow down switch 222 is operated from the eccentric bear-. ing 85. The main motor magnetic clutchoperatthe 1.6-.

switch 194, and the rell-- ing switch 223 is also operated from the eccentric bearing 85.

In operation:

The printing plate and packing may be attached to design cylinder 1 in the usual manner, the switches of the auxiliary motor control station 191 being used to jog or reverse the design cylinder, to permit the ready attachment of the plate to the cylinder.

A new blanket may be attached to the transfer cylinder 2 or the cylinder may be cleaned and its old blanket prepared, the switches of the auxiliary motor control station 191 being used for this purpose.

The color is placed in the ink fountain '7 and the ink is fed to the distributing rollers 11, to obtain the proper distribution for printing. To do this the design and

transfer cylinders

1 and 2, the inking mechanism, and the moistening mechanism are all operated in unison. The ink fountain 13 and transferring the moisture therefrom to the design cylinder 1 through the rolls 13*, 14 and 15, by running the

cylinders

1 and 2 of the printing unit. f

If necessary, the gummay be removed from the printing plate on the design cylinder 1, the jogging switch 193 of the auxiliary motor control station 191 being used for this purpose.

The run switch 192 of the auxiliary motor control station 191 may then be closed to allow the design and transfer cylinders to be run together with the inking and moistening mecha-.

nisms, it being understood thatthe rollers 15 of the moistening mechanism are properly adjusted for the desired amount of moisture to be applied to the design cylinder 1.

- The inking rollers-12 which have been in their raised position out of contact with the design cylinder 1 may then be dropped into contact with the surface of the design cylinder by-unlatching the hook bar 151 from the pin 154,. allowing the operating bar 155 to drop, to bring its shoulder 163 intoengagement with the pin 164' on the rock lever 165. The operating bar 155 which is connectedto the arm 156 of the'rock lever pivoted at 157, is oscillated back and forth by the contact of the spring pressed roller '159 on the lever arm 158 with the face .of the rotary cam .160 on the design cylinder shaft 4. The lever 165 which is fixed to the rock shaft 166, becauseof its connection through the depending arm 167,

rod 168, and depending arm 169, swings the eccentric 1'71 on the shaft 1'70 to permitthe end plate 172 of the inking roller carriage to drop, to permit theinking rollers 12 to be brought into contact with the periphery of the design cylinder 1.

The pressman may now examine the plate on the design cylinder 1 to see if the ink and water are functioning properly. He then raises the of the design cylinder 1. This is accomplished by reengaging the hook bar'151 with the pin 154 on the operating bar 155, thereby raising the'opera/ting bar into engagement with pin 162 and thus reversing the movement'of the rock shaft 166.

During this period of preparing the plate on the design cylinder 1, the design cylinder 1 and the transfer cylinder 2 have been constantly rotatedat a slow speed except when the pressman has wished to examine the plate closely by operating the stop switch 194 of the auxiliary motor control station 191. It is understood that the pressman may also then operate the jog switch 193 of the said station, to bring any particular portion of the plate into ready position for examination.

If satisfied with the condition of the plate on the design cylinder 1, the pressman may then close the run switch 192 of the auxiliary motor control. station 191 and allow the design and transfer cylinders to run together with the inking and moistening mechanisms, thus continuously keeping the plate on the design cylinder moist.

Should the pressman desire to stop the design and transfer cylinders for a considerable period of time, he will, of course, gum the plate on the design cylinder 1, using the jog switch 193 of the auxiliary motor control station 191 to permit the application of the gum solution over the entire surface of the plate.

If the pressman finds the plate in condition for printing he will then prepare to print on the blanket of the transfer cylinder so that the blanket will be in condition to print on the web passing around the impression cylinder, with a minimum amount of waste.

This printing operation is accomplished by throwing the hand lever 86 from position A to position B (see Fig. 5),'thereby moving the eccentric 84 and pushing the switch 203 to break contact, thus deenergizing the trip magnet 1, thereby dropping the plunger 205 which is connected to the arm 129 of the latch lever pivoted at 128.

The latch lever 132 holds the lever arm 131 of the lever, thus releasing the arm 129 from the lever arm 130 so that pressure between the transfer cylinder 2 and'impression cylinder 3 cannot be thrown on when the main motor clutch 59 is out of engagement unless the hand lever 86 is in its position B. Otherwise, if pressure were thrown on the transfer cylinder while rotating, it might come in contact with the impression cylinder when stationary, thus causing damage to web and press.

The levers pivoted at 148 and 144 respectively, through their connecting rods 146 and 142 respec tively, which are operated by the main motor clutch 59 when thrown out of engagement, rock the lever pivoted at 136, thus moving the connecting rod 134 to place the latch lever 132 over arm 131 of the lever pivoted at 128. If hand lever 86 is in position B, the connecting rod 138 moves the lever pivoted at 136, to hold the latch lever 132 out of engagement with the lever arm 131.

When the plunger 295 drops, the connecting bar 126 which is operated by the lever pivoted at 128 causes the hook lever 124 to rise, thus releasing the hook bar 122 when the cam roll 98 is on the low portion of the cam 97. When cam roll 98 reaches the high part of the cam 97, the arm 129 l of the rock lever pivoted at 128 engages the uprising arm 130 of the lever pivoted at 100, thus preventing the cam roller 98 carried by the arm 99 of said lever from following the cam 9'7.

In moving counter-clockwise the lever arm 130 which carries the hook bar 122 is released from engagement with the hook arm 129. The movement of the hook bar 122 carries the operating bar 116 in position to engage the pin 118 on the lever 121. The operating bar 116 is operated by the arm 115 of the cam roll lever pivoted at 114, the cam roll 112 being moved by its camlll, thus causing the operating bar 116 topush against the pin 118, thus rocking the shaft 96 and moving the eccentric bearing through the lever arm and connecting rod 94. V

The latch lever which is pivoted at 104 is operated by the lever which is pivoted at 100, through the double yielding connecting rod 102. This lever pivoted at 104 is provided for preventing the,

operation of the cam operated lever pivoted at 114 and thereby the operating bar 116 while the press is printing at high speed. The connecting rod 106 which is attached to the'lever 121 is provided to hold the latch lever pivoted at 104 away from the cam lever pivoted at 114 while pressure is off and high speed operation of shaft 53 cannot be attained. Ample safety provisions are made so that the operator has only to throw-the hand lever 86 from position A to'posi'tion B and then open the switch 203 to throw pressure on between the design and transfer cylinders. When the operator permits the switch 203 to close, the pressure between these cylinders will automatically go off again.

t is only possible to return the hand lever 86 to its position A after pressure has been released between the design and transfer cylinders. To prevent the operator from making a mistake, the

lock bar 108 carried by the eccentric bearing 85 engages the shoulder 110 to prevent the band ever from being turned. After the pressure has been released between the design and transfer cylinders the eccentric bearing 85 has withdrawn the lock bar 108, thus allowing the handle to be swung back to its position A. This arrangement also prevents the swinging of the handle by mistake from position A to position B when the press is printing, as the lock bar 108 will then engage the shoulder 109 of the hand lever.

From the above description it will be seen that pressure between the design and transfer cylinders may be obtained and that the inking rollers may be raised from or lowered into contact with the surface of the design cylinder regardless of the operation of the tripping mechanism. It will also'be seen that the'ink fountain fee may be stopped, started, adjusted, or held stopped regardless of the operation of the tripping mechanism.

Let it now be assumed that the design and transfer cylinders are ready to start the printing operation: I

The design and transfer cylinders are running slow, say about 30 R. P. M.. The inking rollers are in their raised position, the fountain feed has been stopped and there is no pressure between any of the cylinders. The water applying rollers of the moistening mechanism areassumed to be in contact with the surface of the design cylinder to prevent oxidation.

While the design and transfer cylinderswere It will be remembered that the impression cyl causing a delay in closing the contacts 207 and inder and the web advancing means may be driven independently by the main motor 27 which is under the control of station185, when desiring to accomplish any of 'the operations mentioned in the last paragraph. The run, jog and stop

switches

188, 189 and 190 may be used in connection with the switch 215.

Let it be assumed that the press is now ready to start printing on the web.

It will be borne in mind that the auxiliary motor 28 is driving the design and transfer cyl-' inders and the inking and moistening mechanisms very slowly to keep them-in printing condition.

The print switch 186 of the main motor control station 185 is operated to close the contacts of the switches 186 and 187. The electric current will then passthroughthe contacts of the switch 186, thereby energizing the relay 209 and causing the contacts 210,211 and 212 of the relay 209 to complete their circuits. The energization of the relay 209 causes the main motor 27 to start and run at low speed. The contact 211 maintains the relay circuit. The contact 212 is closed but remains inoperative until the switch 222 is closed by the partial rotationof the eccentric bearing 85, bringing its projection 85* into operative contact with-the plunger 85** of the switch 222.

The closing contacts of the switch 187 energizes the relay 206 which is of the time element type,

208. Closing the contact 207 energizes the main motor clutch 59, bringing its locking pins 59* into locking engagement with the loose gear 58 onthe impression cylinder shaft 6. This main motor clutch 59 in closing, opens the

switches

199 and 198, and closes the switch 197.

The switch 197 is provided to automatically stop the main motor when the printing ceases. When the switch 198 is opened it will break the contact 219 of relay 216, stopping the auxiliary motor 28 and deenergizing the auxiliary motor clutch 56. Opening the switch 199 deenergizes the magnet 204, causing the transfer cylinder to move into impression contact with the design and impression cylinders, as hereinbefore explained.

The

switches

197, 198 and 199 are mechanically operated by the main motor magnetic clutch 59. Opening the switch-199 ensures the main motor clutch 59 being in positive engagement before pressure can be thrown on between the several cylinders. This is important, as all of the cylinders must be driven from the main motor to" ensure correct peripheral speeds. s

It will be noted that the movement of theeccentric bearing 85 when pressure is thrown on, serves to close the

switches

222 and 223. The closing of the switch 222 completes the circuit through the. contacts 212, thus energizing the relay 21-3, causing the main motor to speed up to its full printing speed. It will be noted that the switch 228 controls the maintaining circuit for the relay 206. The press may now beconsidered as printing correctly at high speed and the operator may release 'the printing switches 186, 187 of the main motor control station 185.

Four switches 224, 225, 226 and 227 are provided for stopping the printing according to requirements. 1 The closing of any one of these switches will operate as follows:

If the web should break, the switch 224 will close, thereby energizing the magnet 204 and causing the trip mechanism to operate. This will open the

switches

222 and 223. The opening of the switch 222 will cause thecontact 214 to breakytherebyslowing down the main motor.

The opening of the switch 223 will cause the relay 206 to break the contacts 26'], thereby stopping the flow of current into the clutch 59. The clutch 59 thereby moves out of driving contact, operating the

switches

197, 198 and 199. The switch 197 breaks the contact 211 of the relay 209, causing the relay 209 to reiease the contacts 210, 211 and 212, thus stopping the main motor 2'7. All of the above operations are automatic and operated in proper sequence. It is now necessary to press the run switch 192 of the auxiliary motor control station 191 to allow the auxiliary motor 28 to run, if desired, to keep the printing plate moist. If not, it is necessary to gum the printing plate.

From the above descriptionit will be seen that it is impossible to operate the auxiliarymotor or.

clutch while the press is being driven by'the main motor and the web is being printed.

From the above description it will also be seen that means have been provided whereby the web advancing means and the impression cylinder of the printing unit can be stopped, started, and run entirely independently of the design and transfer cylinders and the design cylinder inking and moistening mechanisms.

pendently of the operation of the web advancing mechanism and impression cylinder.

The above provisions enable the independent handling of the parts, as above enumerated, to

cause the press to be brought into its full printing condition in the shortest possible time and with the least wastage of web material.

While I have illustrated a folder as a part of theweb advancing means, it is to be understood that I do not wish to limit myself to this particular mechanism but desire to cover any mechanism which may be desired to use instead of the folder.

t is also evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence Ido not intend to be limited to the particular embodiment herein shown and described, but

What I claim is: I 1. In an offset printing press, coacting design,

transfer and impression cylinders, their drive,

and means for independently driving the impression cylinder.

2. In an offset printing press, coacting design,

transfer and impression cylinders, their drive,

and means for independently driving the design and transfer cylinders.

'3. In an offset printing press, coacting design, transfer and impression cylinders, web advancing means, their drive, and means for driving the impression cylinder and web advancing means together independently of the design and transfer cylinders.

4. In an offset printing press, coacting design,

transfer and impression cylinders, web advancing means, their drive, and means for driving the design and transfer cylinders independently of the impression cylinder and web advancing means.

5. In an offset printing press, coacting design,

transfer and impression cylinders, their drive,

and means for driving or stopping the impression cylinder independently of the design and transfer cylinders.

transfer cylinders.

6. In an offset printing press, coacting design,

transfer and impression cylinders, their drive, and means for driving or stopping the design and transfer cylinders independently of the impression cylinder.

7. In an oifset printing press, coacting design, transfer and impression cylinders, web advancing means, their drive, and means for driving or stopping the impression cylinder and Web advancing means independently of the design and 8. In an offset printing press, coacting design, transfer and impression cylinders, web advancing means, their drive, and means for driving or stopping the design and transfer cylinders independently of the impression cylinder and web advancing means.

9. In an offset printing press, coacting design, transfer and impression cylinders, their drive, and means for stopping the impression cylinder without stopping the design and transfer cylinders.

10. In an offset printing press, coacting design, transfer and impression cylinders, their drive, and means for stopping the design and transfer cylinders without stopping the impression cylinder.

11. In an offset printing press, coacting design, transfer and impression cylinders, Web advancing means, their drive, and means for stopping the impression cylinder and web advancing means without stopping the design and transfer cylinders.

12. In an offset printing press, coacting design, transfer and impression cylinders, web advancing means, their drive, and means for stopping the design and transfer cylinders without stopping the impression cylinder and web advancing means.

13. In an offset printing press, interconnected coacting design, transfer and impression cylin- 1], ders, their drive, and means for separating and means for operatively disconnecting the transfer and impression cylinders.

14. In an offset printing press, interconnected coacting design, transfer and impression cylin- 124 ders, their drive, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means for driving the design and transfer cylinders independently of the impression cylinder.

15. In an offset printing press, interconnected coacting design, transfer and impression cylinders, their drive, means for separating and meansfor operativelydisconnecting the transfer and impression cylinders, and means for driving the 130 impression cylinder independently of the design and transfer cylinders. I

16. In an offset printing press, interconnected coacting design, transfer and impression cylinders, their drive, means for separating and means .35 for operatively disconnecting the transfer and impression cylinders, means for driving the design and transfer cylinders independently of the impression cylinder and means for driving the impression cylinder independently of the design 140 and transfer cylinders.

17. In an offset printing press, interconnected coacting design,.transfer and impression cylinders, web advancing means, their drive, and means for separating and means for operatively 45 disconnecting the transfer and impression cylinders without disconnecting the impression cylinder and web advancing means.

18. In an offset printing press, interconnected coacting design, transfer and impression cylin- 150 ders, web advancing means, their drive; means for separating and means for operativelydisconnecting the transfer and impression cylinders, and means for driving the design and transfer cylinders independently of the impression cylinder and web advancing means.

19. In an offset printing press, interconnected coacting design, transfer. and impressioncylinders, Web advancing means, their drive, means for separating and means-for operatively disconnecting the transfer and impressioncylinders, and means for driving the impression cylinder and web advanacing means independently of the design and transfer cylinders. 1

20. In an offset pr'intingpress, interconnected coacting design, transfer and impression cylinders, web advancing means, theirjdrive, means for separating and .means for operatively disconnecting the transfer and impression cylinders, means for driving the design and transfer cylinders independently of the impression cylinder and web advancing means and meansfor driving the impression cylinder and web advancing means independently of the design and transfer cylinders.

21. In an offset printing press, interconnected coacting design, transfer and impression cylinders, a motor for driving them, means for separating and means for operatively disconnecting the transfer and impression cylinders, and another motor for driving the design and transfer cylinders independently of the impression cylin der. 7 a 22. In an offset printing press,'interconnected ccacting design, transfer and impression cylinders, web advancing means, a motor for drivingthe cylinders and web advancing means, means for separating and means .for operatively dis-. connecting the transfer and impression cylinders, and another motor for driving the design and transfer cyinders independently .of the impression cylinder and web advancing means.-

23. In an offset printing press, interconnected coacting design, transfer and impression cylin-- ders, a motor. for driving them, means for-separating and means for operatively disconnecting the transfer and impression cylinders, and another motor for driving the design and transfer cylinders independently of the impression cylinder, said first namedrnotor being operable to .rive the impression cylinder independently of the design and transfer cylinders.

24. In an offset printing press, interconnected coasting design, transfer and impression cylin-' ders, web advancing meansa motor for driving the cylinders and web advancingmeans, means for separating and means for operatively 'diSCOnI- nesting the transfer and impression cylinders} and another motor fordriving the design and transfer cylinders independently of the impres sion cylinder and web advancing means, said first named motor being operable to drive the impression cylinder and web advancing meansindependently of the design and transfer cylinders. 25. In an offset printing pressfinterconnected coacting design, transfer and -impression"cylinders, their drive, means for separatingthe transfer cylinder from the design cylinder, and means for separating and means for operatively-dis connecting the "transfer cylinder from the'impression cylinder. 26. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, their drfive,--means for separating the transfer cylinder from the de-- sign cylinder, and means for separating and nieansfor operatively disconnecting the transfer cylinderfrom the impression cylinder.

-27. In an offset printing press, interconnected coactin'g design, transfer and impression cylinders, their drive, means for separating the transfer cylinder from the design cylinder, means for separating and :means for operatively disconnecting the transfer cylinder from the impress sion cylinder, and means for driving the design and transfer cylinders independently of the im.

pression cylinder.

- 28. In an oifsetprinting press, interconnected coacting design, transfer and impression cylinweb advancing means, their drive, means for separating the transfer cylinder from the design cylinder, means for separating and means for operatively disconnecting the transfer cylinder from theimpression cylinder, and means for driving the design and transfer cylinders independently of the impression cylinder and web advancing means.

29. In an offset printing press, interconnected coacting design, transfer and impression cyliners, their drive, means for separating the transfer'cylinder from the design cylinder, means for separating and means for operatively disconnect-- ingthe'transfer'cylinder from the impression cylinder, and means for driving the impression cylinder independently of the design and transfer cylinders. a

30. In an offset printing press, interconnected coacting design, transfer and impression cylinders-webadvancing means, their drive, means for separating the transfer cylinder from thedesign cylinder, means for separating and means for'operatively disconnecting the transfer cylinder from the impression cylinder, and means for driving the impression cylinder and web advancing'means independently of the design and transfer cylinders.

31. In an offset printing press, interconnected coacting design, transfer and impression cylinders, their drive, means for separating the transfer cylinder from the design cylinder, means for cylinders. r

32. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, their drive, means for separating the transfer cylinder from the design cylinder,'means for separating and means for operatively disconnecting the transfer cylinder from the impression cylinder, means for driving the design and transfer cylinders independently of the impression cylinder and web advancing means and means for driving the impression cylinder and web advancing means independently of the design: and transfer cylinders. 1

33; In an offset printing press, interconnected coact-ing design, transfer and impression cylinders, a motor for. driving them, means for separating and means for operatively disconnecting I the transfer and impression cylinders, another motor, and means for operatively connecting it to the design and transfer cylinders.

'34. In an offset printing press, interconnected coacting design, transfer and impression cylinders; amotor for driving'tliem, means for separating and means fo'r operatively disconnecting the transfer and impression cylinders, another motor, and means for operatively connecting it to the design and transfer cylinders, said first named motor being operable to drive the impression cylinder after the transfer and impres-v sion cylinders have been separated and disconnected.

35. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, a motor for driving it and the cylinders, means for separating and means for operatively disconnecting the transfer and impression cylinders, another motor, and means for operatively connecting it to the design and transfer cylinders.

36. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, a motor for driving it and the cylinders, means for separating and means for operatively disconnecting the transfer and impression cylinders, another motor, and means for operatively connecting it to the design and transfer cylinders, said first named motor being operable to drive the impression cylinder and web advancing means after the transfer and impression cylinders have been separated and disconnected.

37. In an offset printing press, a printing unit comprising interconnected coacting design, transfer and impression cylinders, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means operable to drive the printing unit as a whole and the design and transfer cylinders independently of the impression cylinder. 1

38. In an offset printing press, a printing unit comprisinginterconnected coacting design, transfer and impression cylinders, means for separating and means for operatively disconnecting the transfer and impressioncylinders, and means operable to drive the printing unit as a whole and the impression cylinder independently of the design and transfer cylinders.

39. In an offset printing press, a printing unit comprising interconnected coacting design, transfer and impression cylinders, means for separating and means'for operatively disconnecting the transfer and impression cylinders, and means operable to drive the printing unit as a whole, the design and transfer cylinders independently of the impression cylinderand the impression cylinder independently of the design and transfer cylinders. i V

40. In an offset printing press, a printing unit comprising interconnected coacting design, transfer and impression cylinders, web advancing means, means for separating and means for 0peratively disconnecting the transfer and impression cylinders, and means operable to drive theweb advancing means and the printing unit as;

awhole and the designand transfer cylinders independently of the impression cylinder and Web advancing means. 7 r

41. In an offset printing press, a printing unit comprisinginterconnected coacting design, transfer and impression cylinders, web advancing means, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means operable to-drive the web advancing means and the printing unit as a whole and the impression cylinder and webadvancing means independently of the design and transfer cylinders.

42. In an offset printing press, a printing unit comprising interconnected coacti gdesign, transfer and-impression cylinders, web advancing means, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means operable .to drive the web advancing means and the printing unit as a whole, the design and. transfer cylinders independently of the impression cylinder and Web advancing means and the impression cylinder and web advancing means independently of the design and transfer cylinders.

43. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means for driving the design, transfer and impression cylinders and, when the transfer and impression cylinders are disconnected, the impression cylinder independently of the design and transfer cylinders.

44. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating and means for operatively disconnecting the transfer and impression cylinders, means for driving the design, transfer and impression cylinders and, when the transfer and impression cylinders are disconnected, the impression cylinder independently of the design and transfer cylinders, and the design and transfer cylinders independently of the impression cylinder.

45. In an offset printing press, interconnected coacting design, transfer and impression cylinders, and means for moving the transfer cylinder out of contact with the design and impression cylinders and means for operatively disconnecting the transfer cylinder from the impression cylinder.

48. In an offset printing press, interconnected coacting plate, transfer and impression cylinders, means for moving the transfer cylinder out of contact with the design and impression cylinders and means for operatively disconnecting the transfer cylinder from the impression cylinder, a common means being provided for driving all of tliecylinders when interconnected and for driving the impression cylinder when disconnected, and other means being provided for driving the design and transfer cylinders when the transfer cylinder is operatively disconnected from the impression cylinder.

47. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operativelydisconnecting the transfer and impression cylinders to permit the independent operation of the design and transfer cylinders.

43. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, means for separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders to permit the 1 independent operation of the design and transfer cylinders.

49.'In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders to permit the independent operation of the impressioncylinder. g

50. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, means for separating the design and transfer cylinder without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders to permit the independent operation of the impression cylinder and web advancing means.

51. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating the design and transfer cylinders without operatively disconnecting them, and means for separating and means for operatively disconnecting the transfer and impression cylinders to permit the independent operation of the design and transfer cylinders and independent operation of the impression cylinder.

52. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, means for separat ing the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders to permit the independent operation of the design and transfer cylinders and independent operation of the impression cylinder and web advancing means.

53. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for driving them as a unit, means for separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively dis-,

connecting the transfer and impression cylinders, and means for driving the design and transfer cylinders independently of the impression cylinder.

54. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, means for driving them as a unit, means for separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means for driving the design and transfer cylinders independently of the impression cylinder and web advancing means.

55. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for driving them as a unit, and means for separating the design and transfer cylinders without operatively disconnecting them,

means for separating and means for operatively disconnecting the transfer and impression cylinders, said driving means being operable to drive the impression cylinder independently of the design and transfer cylinders.

56. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, means for driving them as a unit, means for separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders, said driving means being operable to drive the impression cylinder and web advancing means independently of the design and transfer cylinders.

5'7. In an offset printing press,.interconnected coacting design, transfer and impression cylinders, means for driving them as a unit, means for'separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means for driving the design and transfer cylinders independently of the impression cylinder, said driving means'being operable to drive the impression cylinder independently of the design and transfer cylinders.

58. In an offset printing press, interconnected coacting design, transfer and impression cylinders, web advancing means, means for driving them as a unit, means for separating the design and transfer cylinders without operatively disconnecting them, means for separating and means for operatively disconnecting the transfer and impression cylinders, and means for driving the design and transfer cylinders independently of the impression cylinder and web advancing means, said driving means being operable to drive the impression cylinder and web advancing means independently of the design and transfer cylinders.

59. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating the cylinders without operative disconnection and means for operatively disconnecting the transfer and impression cylinders.

60. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating the transfer and impression cylinders without operative disconnection and means for operatively disconnecting said transfer and impression cylinders.

61. In an offset printing press, interconnected coacting design, transfer and impression cylinders, means for separating the design and transfer cylinders without operative disconnection, means for separating the transfer and impression cylinders without operative disconnection, and means for operatively disconnecting the transfer and impression cylinders.

62. In an offset printing press, coacting design, transfer and impression cylinders and a web advancing means, a motor for driving them, a second motor, means for bringing one motor into and means for bringing the other motor out of operative connection with the design and transfer cylinders.

63. In an offset printing press, coacting design, transfer and impression cylinders and a webadvancing means, a motor for driving them, a second motor, means for bringing the second motor into and means for bringing the first motor out of operative connection with the design and transfer cylinders.

HOWARD M. BARBER.