US3871294A - Duplicator master feed using decimal code to set copy count - Google Patents

Abstract

An automated offset lithographic duplicating machine permits to automatically mount a master or lithographic plate on a master cylinder, to apply ink repellent etching solution to the mounted master or lithographic plate in a time predetermined by the operator, and to perform a number of sequential duplicating steps of a duplicating cycle. The washing of a blanket cylinder, constituting the final step of the duplicating cycle of a lithographic plate, is performed in a time predetermined by the operator before the cylinder automatically stops. The number of copies to be duplicated for each lithographic plate is indicated by an indicator after marks on the lithographic plate, for indicating the number of copies to be duplicated, are read by a device provided in the machine. When the number of copies indicated by the indicator has been duplicated, washing of the blanket cylinder is automatically initiated.

Description

United States Patent 1191 [11] 3,871,294 Mar. 18, 1975 Kagari et al.

[54] DUPLICATOR MASTER FEED USING 3,547,027 12/1970 Gombault l0l/132.5

DECIMAL CODE TO SET COPY COUNT 3,562,491 2/1971 Branfield- 3,585,928 6/1971 Kaneko.... 1 Inventors: Yoshiharu g i i 3,650,204 3/1972 Burger 101/132 x Japan FOREIGN PATENTS OR APPLICATIONS [731 Asslgnee: filg Kaisha Rico", Tokyo 174,210 12/1969 United Kingdom 101/132 [22] Filed: July 10, 1972 Primary ExaminerRobert E. Bagwill Assistant Examiner-R. E. Suter [21] Appl' 270561 Attorney, Agent, or Firm-McGlew and Tuttle Related U.S. Application Data 63] Continuation-in-part of Ser. No, 882,648, Dec. 5, ABSTRACT 19691 abandoned' An automated offset lithographic duplicating machine permits to automatically mount a master or litho- [301 Apphcatlon pnomvy Data graphic plate on a master cylinder, to apply ink repe|- Dec. 30, 1968 Japan 43-96546 lent etching solution to the mounted master or lithographic plate in a time predetermined by the operator, [52] U.S. Cl. ll/132.5, 101/142 and to perform a number of sequential duplicating [51] Int. Cl. B411 11/08, B411 1l/14 steps of a duplicating cycle. The washing of a blanket Field of Search 3 cylinder, constituting the final step of the duplicating 35, 13 2, 91 cycle of a lithographic plate, is performed in a time predetermined by the operator before the cylinder aul l References Cited tomatically stops. The number of copies to be dupli- UNITED STATES PATENTS cated for each lithographic plate is indicated by an in- 2,906,196 9/1959 Ritzerfeld et a1. 101/2 after marks on the lithographic for indi' 2,950,049 8/1960 Mazer et al 235/6l.ll cating the number of copies to be duplicated, are read 3 9 5 019 12 19 0 Hayes et 1 10 32 X by a device provided in the machine. When the num- 3,l02,470 9/1963 Cragg et al. 101/144 ber of copies indicated by the indicator has been du- 20,3 H1969 Ro g t -m- 2 plicated, washing of the blanket cylinder is automati- 3,457,ss7 7/1969 Burger 101/144 Cally initiated. 3,470,357 9/1969 Ritzerfeld 101/132.5 UX 3,493.301 2/1970 Sable et al. 101/91 x 3 Claims, 62 Drawing Figures 5 {)1 122 J 5 D4 i I 1 P I llllllllll llllllllll llllllllll llllllllll OI 23456789 0123456789 O|2 3456789 Ol23456789 PATENTEU 3.871.294

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Claims (3)

1. An automatic duplicating machine, of the offset lithographic type, using substantially rectangular masters having a leading edge and a trailing edge interconnected by a pair of longitudinal side edges, said machine comprising, in combination, a master cylinder having gripping means operable to grip the leading edge of a master fed thereto; an automatic master feed device operable, responsive to actuation of a start control, to initiate feeding of a master to said master cylinder; the masters fed by said automatic master feed device having impressed thereon markings indicating the respective number of duplicates to be made from each master; the markings impressed on each master including a first row of timing marks extending longitudinally of one Of said side edges thereof and impressed on the master in separated decades with each decade representing a respective column position of a multi-column decimal number, and each timing mark in each of said decades representing a respective decimal digit from 0 to 9; and a second row of longitudinally spaced data marks extending parallel to and spaced laterally from said first row and including one respective single said data mark impressed on the master adjacent each decade of timing marks; each data mark being aligned laterally with that timing mark, of its associated decade, representing the respective decimal digit, in column position, of the decimal number represented by all the data marks and which decimal number represents the number of duplicates to be made from the respective master; a master blanket cylinder engageable with a master on said master cylinder to have impressed, on its peripheral surface, an ink image of the master then mounted on said master cylinder; an impression cylinder adjacent and movable toward said blanket cylinder to press copy sheets against the peripheral surface of said blanket cylinder to provide duplicates of the master; an etching solution applicator operable to apply an ink-repellent etching solution to the master then mounted on said master cylinder; an inking device operable to apply ink to the master; means operable, responsive to completion of the etching solution application, to activate said inking device to initiate application of the ink to the master; means manually operable to preset a preliminary inking time for applying a quantity of ink sufficient to start duplication of the master; a copy sheet feed device; means operable, upon termination of the preliminary inking time, to activate said copy sheet feed device to initiate and continue feeding of copy sheets between said blanket and impression cylinders; a read-out device operable to scan separately the timing marks and the data marks on each master fed to said master cylinder and, responsive to simultaneous scanning, in each column position, of said data mark and its respective laterally aligned timing mark, providing an output signal representing the decimal digit, in the respective column position of the scanned data mark, whereby to provide decimal output signals indicative of the respective number of duplicates to be made; memory means and a data register connected to said read-out device to receive said output signals and to store and register the indicted number of duplicates; counting means operable to count the number of duplicates produced from each master; signal generating means; coincidence circuit means connected to said memory means; said data register, said counting means and said signal generating means, operable, responsive to coincidence between the stored numbers of duplicates and the counted number of duplicates, to activate said signal generating means to issue a command terminating operation of said copy sheet feed device; master removing means activated, responsive to such command, to remove the master from said master cylinder; and a cleaning device operable automatically, upon completion of duplication of a master, to clean said blanket cylinder.

2. An automatic duplicating machine, as claimed in claim 1, in which said markings further include a start mark impressed on each master and aligned with said second row of data marks and positioned between said second row of data marks and said leading edge of the associated master; said read-out device providing indications of the respective number of duplicates to be made only responsive to initial scanning of said start mark.

3. An automatic duplicating machine, as claimed in claim 2, in which said read-out device comprises a data mark sensing circuit operable to sense said data marks; a timing mark reading circuit operable to read said timing marks; a temperary data register connected to the outputs of said data mark sensing circuit and said timing mark reading circuit; a carrY signal counter connected to the output of said timing mark reading circuit; said first mentioned data register being connected to said temporary data register and to said carry signal counter and registering a count only responsive to signals produced simultaneously by said temporary data register and said carry signal counter; said coincidence circuit means being connected to said first-mentioned data register and to said counting means.

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