US1265726A - Sheet-feeding mechanism for printing-presses. - Google Patents

Description

H. M. BARBER.

SHEET FEEDING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED OCT. 3, 19I2.

Patented May'14,1918.

3 SHEETS-SHEET I.

fi in 96196152" H. M. BARBER.

SHEET FEEDING MECHANISM FOR PRINTING PRESSES.

Patented May l l, 1918.

3 SHEETS-SHEET 2- zz ag MW H. M. BARBER.

SHEET FEEDING MECHANISM FOR PRINTING PRESSES.

APPLICATKON FILED OCT-3,1912.

Patented May 14, 1918.

3 SHEETS-SHEET a.

fifineavea; 1'' f4 3%1 HOWARD M. BARBER, OF STONINGTON, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, 'I'O C. B. COTTBELL &' SONS COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

SHEET-FEEDING MECHANISM FOR PRINTING-PRESSES.

Specification of Letters Patent.

Patented May 14:, 1918.

Application filed October 3, 1912. Serial No. 723,731.

To all whom it may concern:

Be it known that I, Howam) M. BARBER, a citizen of the United States, and resident of Stonington, in the county of New London and State of Connecticut, have invented a new and useful Improvement in Sheet-Feeding Mechanism for Printing-Presses, of which the following is a specification.

This invention relates to sheetfeeding mechanism for printing presses and has for its object to provide means for successfully feeding sheets in register to a high speed rotary printing machine.

In those machines where the sheets are fed directly to the impression cylinder of a high speed rotary printing machine, it is practically impossible to properly register the sheets owing to the abrupt starting of the sheets at high speed after they have been engaged by the impression cylinder grippers.

In order to overcome this very objectionable feature, I have devised means whereby the sheets to be printed may be taken from any suitable source of sheet supply such as a sheet feeding table and carried into the machine in absolute register, said means comprising a sheet feeding cylinder driven at irregular speeds whereby the sheets may be taken from the source of sheet supply while'the cylinder is traveling at a very low speed and fed while the sheet feeding cylinder is traveling at a high speed as, for instance, at the same surface speed as the printing cylinders.

To facilitate the feeding of the sheets in accurate register, I preferably interpose a transfer cylinder traveling at the same surface speed as the printing cylinders, between the printing cylinders and the sheet feeding cylinders, said transfer cylinder being arranged to take the sheets from the sheet feeding cylinder.

I have shown this invention applied to a two revolution rotary printing machine.

In the accompanying drawings,

Figure 1 represents in transverse vertical) section so much of a two revolution rotary printing machine with my invention applied thereto, as will give a clear understanding of the same,

Fig. 2 is a detail view in side elevation of the machine,

Fig. 3 is a face view of the cam which controls the cams which operate the gripperson the impression cylinder and transfer cylinder, and

the rotary cam shaft 5 through gears 6, 7,

and the impression cylinder 4 may be driven from the form cylinder 3 through gears 8, 9. The impression cylinder 1 may be brought into and out of its coaction with the form cylinder 3 by the mechanism 10, of Well known or approved form, controlled from the cam shaft 5.

A transfer cylinder 11 is driven at the surface speed of the impression cylinder 41 through a gear 12 which meshes with the gear 9.

A sheet feeding cylinder 13 is interposed between the transfer cylinder 11 and the sheet feeding table 1. This sheet feeding cylinder 13 is driven from the transfer cylinder 11 through a geared connection comprising the gears 14, 15, 16, 17 and 18. The gears 14. 15 and 16 are regular circular gears and the gears 17 and 18 are irregular gears, in the present instance elliptic gears.

The geared ratio between the transfer cylinder 1 and the sheet feeding cylinder 13 is such that the sheet feeding cylinder 13 travels one revolution for every two revolutions of the transfer cylinder 11 and the irregular gears l? and 18 are so arranged that the sheet feeding cylinder 13 will be caused to travel at a very low speed at its sheet receiving point and at a higher speed or at the surface speed of the transfer cylin- The opening and oh of the sheet feeding I ceiring point may he controlleifl by the eel known pin actuated tuinliler iucchun'i n The opening and closing of the e'rippers of the sheet feeding cylinder 1) at the point- Where they deliver the sheet to the transfer cylinder grippc 2t. is controlled by u stationary cam. 26 which is arranged to engage the roller on the arm fixed to the gripper rod 28.

The transfer cylinder grippers 22lure operated every second revolution to 2981\"(3 the sheet from the sheet feeding cylinder grippers 22 and transfer the sheet to tie impression cylinder grippers 29 by a cam lever 30 hearing can surfaces 31, or ranged to engage the roller on the arm B l fixed to the gripper rod The imprensiou cylinder grippers 29 are operated ercry second revolution to receive the sheet from the transfer cylinder grippers 2sand deliver the printed sheet to the deliyery mechanism 2 by a cam lever hearing cani surfaces 3?, 38, urranged to engage hc roller 39 on the arm i0 fired to the gripper shaft *l-l. These two coin levers 30, 36, are connected and are operated from a cam on the coin shaft 5 through a rod d3.

it will be seen that by the use of the mech anism suhstan 'ully as herein shown and described, sheets may be taken from th source of sleet supply at such a low soeed as to insure en ehsolute register of the sheets and may then he transferred at the speed the press thus insur u high character Work in hi h speed press.

ll het l claim is l. in a sheet feed rotary printing niachine, high speed printing cylinders, source of sheet upply and mechanism for insuring increased speed with ucc .rate sheet register, coinp ig continuously moving means arranged to take the sheets from the source of sheet supply at a low speed and feed them to the printing cylrr hieh peed.

C5 1 means I to source of sheet supply at a low speed and feed them to the printing cylinders at the surface speed thereof.

in a sheet iced rotary printing machine high speed printing cylinders, a source of sheet supply and mechanism for insuring i. in a rotary printing machine, printing cylinders, source of sheet supply, a transfer cylinder arranged to travel at the surface speed of the printing cylinders and continuously inoying means arranged to take the sheets from the source of sheet supply at a low speed and feed them to the transfer cylinder at the surface speed thereof.

5. a rotary printing machine, printing cylinders, sheet feeding table, it transfer cylinder arranged to travel at the surface speed of the printing cylinders and continuously moving means arranged to take the sheets from the table at a low speed and feed them to the transfer cylinder at the surface speed thereof.

6. l a rotary printing; machine, printing; o inders, a source of sheet supply, a, transfer cylinder arranged to travel at the surface speed of the printing cylinders and a continuously rotuting sheet feeding cylinder arranged to take the sheets from the of sheet supply at s low speed and d them to the transfer cylinder at the "taco speed thereof.

in In rotary printing machine, printing cylinders, a sheet feeding table, it transfer *1 inder arranged to travel at the surface speed of the printing cylinders and a c0ning point and at the surface speed of the transfer cylinder at the sheet delivery point, 9. in a rotary printing machine, printing 1 sheet transfer cylinder arranged to travel at the surface speed of the printing cylinder at s low speet at the sheet receiyi continuously driven irregular gears for driving the sheet feeding cylinder at a low speed at the sheet receiving point and at the surface speed of the transfer cylinder at the sheet delivery point.

10. In a rotary printing machine, printing cylinders, a source of sheet supply and means for feeding sheets therefrom to the printing cylinders comprising a sheet feeding cylinder, a transfer cylinder and a geared connection including irregular gears between the transfer and sheet feeding cylinders.

11. In a rotary printing machine, printing cylinders, a sheet feeding table and means for feeding sheets therefrom to the printing cylinders comprising a sheet feed ing cylinder, a transfer cylinder and a geared connection including irregular gears between the transfer and sheet feeding cylinders.

In testimony, that I claim the foregoing my invention, I have signed my name in presence of two Witnesses, this first day of October, A. D. 1912.

HOWARD M. BARBER.

Witnesses:

A. R. STILLMAN. E. M. GRANT.

@opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, I). 0.

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