US1886527A

US1886527A - Electric motor drive for web printing and cutting mechanisms

Info

Publication number: US1886527A
Application number: US375830A
Authority: US
Inventors: Calvert B Cottrell
Original assignee: Individual
Current assignee: CB Cottrell and Sons Co
Priority date: 1929-07-03
Filing date: 1929-07-03
Publication date: 1932-11-08
Anticipated expiration: 1949-11-08

Description

Nov. 8, 1932. c. B. COTTRELL, so

ELECTRIC MCTORI DRIVE FOR WEB PRINTING AND CUTTING MECHANISMS Filed July 3. 1929 2 Sheets-Sheet l ATTORNEYS Nov. 8, 1932. c. B. COTTRELL, 313 1,835,527

ELECTRIC MOTOR DRIVE FOR WEB PRINTING AND CUTTING MECHANISMS Filed July 3, 1929 I 2 Sheets-Sheet 2 ENVENTOR JW 7 ATTOR N EYS Patented Nov. 8, 1932 2 RA E NT; OFFICE CALVERT B. GOTTBELL, 8n, WESTEBLT, BHQDE ISLAND, ABSIGNOB G. B. ODTTBEL &

, SONS comm,- OI' WEBTERLY, 3HODE mm, A CORPORATION 02' DELAWARE nmc'rmc noroamuvn roa was rnm'rnro mn'cu'rrma nacnamsus Application fled July 3, mares-1's... 875,880.

The object of my invention broadly is to rovide an electric motor drive for webprintmg and cutting mechanisms, which drive 1ncludes master and auxiliary motors and a means for maintaining the auxiliary motors at predetermined speeds relative to the master motor. 7 The object, more cifically, is to rovide amaster motor .for t e printing mec amsm, w an auxiliary motor for the cutting mechanism and an auxiliary motor for the mechanism which feeds the printed web to the:

cutting mechanism, together with. means for maintainin the auxiliary motors forthe'cutting and eedin mechanisms at predetermined s eds re ative to the master motor, web tension controlled means being provided for varying the speed of the auxilia for the prmted web feeding mechanlsm and web tension controlling means being 'provided forthe web as it passes from one printing unit to another printing unit to bring the prmting units intoregiste A practical embodimentof my invention 13 is re resented in the accompanying drawings, inwich Fig. 1 represents a diagrammatic plan view showing the electric equipment for a four color two printing unit rotary web printing press, together with means for cutting sheets therefrom and with my novel control means associated therewith; 1

Fig. 2 represents a diagrammaticsldevlew v anism be as desired to cutlonger or Shorter {sheets from the web. The master motor 14 n. is shown as driving 'a shaft 20 throu

h bevel gears

21, 22. a This shaft 14 is provi ed with v ofthe-same; H Fig. 3 represents a detail view of one of the belt shifting mechanisms; and

Fig. *i'represents anenlarged view one 'of the control'mechanisms.

It will be understood that the several are of the electric equipment shown may be of any well lmown or approved construction. The web supply roll is denoted-by 1 and the v web by 3." The web led from the supply 4-5 roll 1 to and through the'first printing unit motor of the printingmechanism which is shown, in the present Instance as comprising an impression cylinder 4 and its two coacting form cylinders 5 and 6. From thence the web 3 leads to and through the second printing unit of the printing mechanism whlch is herein shown-as comprislng an impression cylinder 7'and its two coacting form cylinders 8 and 9.

From thencethe web 3 printed in four colors is led through the air of coacting feedin rolls 10,-11 of .-a eeding mechanism an through thecoacting rotary cutters '12 and 13 of a web cutting mechanism. Theprint ingbumts, the web feeding mechanism and the we cutting mechanism may all be of any well known or approved construction and arrangement;

" The first printing unit'is shown as driven by a master motor 14, the second printing unit by an auxiliary electric motor 15, the web feeding mechanism by an a'uxilia motor 16 and the web cutting mechanism by an auxiliarymotor 17. These motors derive their. throug its manually o erated voltage contr0l19which controls, y'varyin the voltage in the generator, the spee o the was ter motor 10 and the normal relative speeds Wer from a motor-generator 18 of the

auxiliary motors

15, 16 and 17. In

the present instance it is intended that the master motor 14 and the

auxiliary motors

15 and 16 be the same and thatthe speed-of.

the auxiliary motor 17 for the cutting mecha bevel

gear driving connection

23, 24 with shaft 29 is shown as being provided with a reverse cone pulley 30 over which pulleys a a pulley shaft-25 on which is mounted a pulley 26. The, shaft 27 of the auxiliary motor 15 is provided with acone pulley 28 and the carried b the rock levers 35, 36, the free ends of w ich are connected by a flexible connection, in'the present instance a'sprocket chain 37 with a sprocket wheel 38 carried b the shaft 39 on which the arm 40 of a rli eostat 41 is carried. A driving belt 42 asses around the

pulleys

26, 32, 33, 34.

prings 43, 44 serve the double purplose of holding the levers 35,36 and the r eostat arm 40 in their neutral positions and also of holding the driving belt 42 under slight tension.

The means for varying the tension of the web as it passes from one rinting unit to the other printing unit to ring t e printg units into register on the'web is as follows The web 3 passes over a roller 45 held under upward stress by a weighted flexible connection 46 tending to take up the slack in the web between the two printing units. This roller 45 is connected b -a rod 47 with one arm 48 of a bell crank ever, the other arm 49 of which is connected by a rod 50 with a belt shifter fork 51 which embraces the belt 31. The web 3 onits way from the first printing unit to the roller 45 passes between rollers 52, 53, carried by a two armed lever 54, 55 provided with a hand micrometer ad'ustment 56 of any well known or approve form. a

The controls for the

auxiliary motors

16 and 17 are connected tothe shaft 20 of the master

motor throughtthecross shafts

59, 60,

bevel gear'connections

61,62 and 63, 64 with the longitudinal shaft 65, the bevel gear connections 66, 67 with the cross shaft 68 and the bevel gearconnections 69, 70 with the first named shaft 20. A belt 71. passes around a cone pulle 72 on the cross shaft 73, located over the s aft 59, and also around a reverse cone pulley 74 on the shaft 75 of the auxiliary motor 16. Similarly, a belt 76 passes around a cone pulley 77 on a cross shaft 78, located over the shaft 60, and also around a reverse cone pulley 79 on the shaft 80 of the auxiliary motor 17. The motor driven shaft 59 also has a ulley 81 and the shaft 73 has apulle 82. ulleys 83, 84 are carried by two roc levers 85, 86, the free ends of which levers are connected by a flexible connection, in the present instance a sprocket chain 87 with a sprocket wheel 88, carried by the shaft 89 on which the arm 90 of a rheostat 91 is carried. A driving belt 92 passes around the 84. Springs 93, 94 serve the double purpose of holding the levers 85, 86 and the rheostat arm 90 in their neutral positions and also of holding the driving belt 92 under sli ht tension.

Similarly,the master motor driven shaft is provided with a pulley 95 and the shaft 78 with a' pulle 96. Pulleys 97, 98 are carried by two roc levers 99, 100, the free ends which 72, 74.

pulleys 81, 82, 83,,

of which levers are connected by a flexible connection, in the present instance a sprocket chain 101 with a sprocket wheel 102 carried by the shaft 103, on which the arm 104 of a rheostat 105 is carried. A driving belt 106 passes around the pulleys 95, 96, 97, 98. Springs-107, 108 serve the double pur ose of holding the levers 99,100 and the r eostat arm 104 in their neutral positions and also of holding the driving belt l06 under slight tension.

The varying tension of the printed web 3 as it passes to the mechanism for feeding the web to the cutting mechanism controls the speed of the auxiliary motor 16 as follows:

The web 3 passes over a roller 109 held under upward stress by a weighted flexible connection 110 tending to take up the slack in the web. This roller 109 is connected by a rod 111 with a bell crank lever 112 which, in turn, is connected by a rod 113 with a belt shifting fork 114 which embraces the belt 71 passes over the reverse cone pulleys The operation of the device is as follows: When the

auxiliary motors

15, 16 and 17 are running at predetermined speeds with respect to the speed of the master motor 14,

the rheostat control arms 40, 90, and 104 are.

held in their neutral positions as well a's'their controlling rock levers; Should any of these auxiliary motors start to run ahead or .behind the additional pull on their control device belts 42, 92 or 106 will cause their rock levers to move in opposite directions, thereby causing their rheostat arms40, 90 and 104 to move along their contacts in one or the other direction from their neutral positions, thereby causing their respective auxiliary'motors to slow down or speed up,to their predetermined relative speeds with respect to the master motor 14. Should the web 3 run ahead or-behind from the first printing unit to the second printing unit the additional compensating device will come into action to shift the belt 31 on its

reverse cone pullevs

28, 30 to vary the speed of the auxiliary motor 15 with respect to the master motor 10. The micrometer adjustment may also be used to bring the first and second printing units into proper register by varying the distance which the web 3 travels from the first printing unit iliary motors will be automatically corrected to bring them into their relative speeds with respect to the master motor as well as ensuring the proper register between the first and second printing operations and the proper feeding register for the printed Web to the cutting mechanism.

\Vhile I have illustrated my invention in connection with a two printing unit four color printing press it is evident that I do not wish to limit myself to such a press but contemplate the use of my invention in connection with various types of presses where the equipment is applicable.

What I claim is 1. lVeb printing and cutting mechanism and an electric motor drive therefor, including a source of current supply, a master motor for the printing mechanism and an auxiliary motor for the cutting mechanism, and means for maintaining the auxiliary motor at a predetermined speed relative to the master motor.

2. lVeb printing and cutting mechanism and an electric motor drive therefor, including a source of current supply, a master motor for the printing mechanism and an auxiliary motor for the cutting mechanism, and means including an automatically controlled rheostat for maintaining the auxiliary motor at a predetermined speed relative to the master motor.

3. \Veb printing, feeding and cutting mechanisms and an electric motor drive therefor, including a source of current su ply, a master motor for the printing mechanism and auxiliary motors for the feeding and cutting mechanisms, and means for maintaining the auxiliary motors at predetermined speeds relative to the master motor.

4. Web printing, feeding and cutting mechanisms and an electric motor drive therefor, including a source of current su ply, a master motor for the printing mechanism and auxiliary motors for the feeding and cutting mechanisms, and means including automatically controlled rheostats for maintaining the auxiliary motors at predetermined speeds relative to the master motor.

5. Web printing, feeding and cutting mechanisms and an electric motor drive therefor, including a source of current su ply, a master motor for the rinting mechanism and auxiliary motors or the feeding and cutting mechanisms, means for maintaining the auxiliary motors at predetermined speeds relative to the master motor, and web tension controlled means for varying the speed of the auxiliary motor for the web feeding mechanism.

6. Web printing, feeding and cutting mechanisms and an electric motor drive therefor, including a source of current su ply, a master motor for the rinting mechanism. and auxiliary motors or the feeding