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Publication numberUS1614177 A
Publication typeGrant
Publication dateJan 11, 1927
Filing dateApr 19, 1926
Priority dateApr 19, 1926
Publication numberUS 1614177 A, US 1614177A, US-A-1614177, US1614177 A, US1614177A
InventorsBarber Howard M
Original AssigneeCottrell C B & Sons Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Means for preventing undue tension in multicolor perfecting printing presses
US 1614177 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

. 1,614,177 11 1927' H. M. BARBER MEANS FOR PREVENTING UNDUE TENSION IN MULTICOLOR PERFECTING PRINTING PRESSES Filed April 19 1926 INVENTOR M ATTORNEYS Patented Jan. 11, 1927.

UNITED'STATES PATENT OFF-ICE.

HOWARD 1VL- BARBER,

SONS COMPANY, OF

MEANS FOR PREVENTING UNDUE TENSION IN MULTICOLOR PERFECTING PRINTING IRESSES.

Application filed April 19, 1926. Serial No. 103,023.

In multi-colo-r web perfecting printing presses where the plate and impression cylinders of the second printing unit are the same diameters as the plate cylinders of the first printing unit and the impression cylinder of the first printing unit is twice or any other multiple of the diameter of the 1mpression cylinder of the second printing unit, it has been very difficult to so feed the web to the second printing unit as to prevent undue strain on the web.

To cause the second printing unit to run in unison with the first printing unit so that the web will be fed properly to the second printin unit, to prevent undue'strain on a v a the web, I have found that it IS necessary to make the bearer diameters of the plate and impression cylinders of the second printing unit a predetermined amount less than their aliquot part of the bearer diameter of the impression cylinder of the first printing unit.

For example: In a machine where the impression cylinder of the second pr nting unit is approximately one-half the diametenof the impression cylinder of the first printing unit, the bearer diameters of the impression and plate cylinders of the second printing unit must be made slightly smaller than onehalf the bearer diameter of the impression cylinder of the first printing unit to eliminate any tendency to produce an undue strain on the web between the two printing units.

A practical embodiment of my invention is represented in the accompanymg drawing which discloses in diagram a multi-color web perfecting rotary printing press arranged to print four colors on the first side of the web and then two colors upon the other side of the web.

The four plate cylinders of the first printing unit are denoted by 1, 2, 3, 4 and their common impression cylinder by The two slate cylinders of the second prlnting unit are denoted by 6, 7 and their common impression cylinder by 8. The impression cylinder 5 of the first printing unit is shown as being twice the diameter of the impression cylinder 8 of the second printing unit. The web which is led in the usual manner through the first and second printing units, is denoted by 9. In this case the bearer diameters of the plate and impression cylinders 6, 7 and 8 of the second-printing unit should be slightly less than one-half the bearer diameter of the impression cylinder 5 of the first printingunit, to prevent undue strain on the web.

lVhat I claim is 1. In a multi-color web per 'ecting printing press, two printing units in which the diameter of the impression cylinder, of the second printing unit is an aliquot part'o't the diameter of the impression cylinder of the first printing unit, the bearer diameters of the plate and impression cylinders of the second printing unit being a predetermined amount less than their aliquot part of the bearer diameter of the impression cylinder of the first printing unit, whereby the second printing unit is caused to run in unison with the first printing unit to prevent undue strain on the web between the printing units.

2. In a multi-color web perfecting printing press, two printing units in which the diameter of the impression cylinder of the second printing unit is one-half the diameter of the impression cylinder of the first printing unit; the bearer diameters of the plate and impression cylinders of the second printing unit being a predetermined amount 0F PAWCATUCK, CONNECTICUT, ASSIGNOR TO C. B. COTTRELL & WESTERLY, RHODE ISLAND, A CORPORATION OF DELAWARE.

less than one-half the bearer diameter of the impression cylinder of the first printing unit, whereby the second printing unit is caused to run in unison with the first printing unit to prevent undue strain on the web between the printing units. i

In testimony, that I claim the foregoing as my invention, I have signed my name this 29th day of March, A. D. 1926.

' HOWARD M. BARBER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6516717Oct 16, 2000Feb 11, 2003Heidelberger Druckmaschinen AgModular printing machine system for printing on sheets
EP1092533A1 *Sep 20, 2000Apr 18, 2001Heidelberger Druckmaschinen AktiengesellschaftModular printing system for printing sheets
Classifications
U.S. Classification101/179, 101/248
International ClassificationB41F5/00, B41F5/18
Cooperative ClassificationB41F5/18
European ClassificationB41F5/18