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Addressograph Multigraph Corporation

Ronald Duane Elms

Thomas V DeRyke

Kenneth J Fedesna

A programmable microfiche duplicator and sorter apparatus is provided, including control means which operate in accordance with input data received from a teletype or other remote input peripheral, or from a code carried by the master film. The input data is stored in memory and defines the number of copies to be made, the sorter mode and the sorter start position for collation operations.

Programmable microfiche duplicator and sorter apparatus

The method includes steps for and the apparatus includes means for determining the absolute position of a movable element mounted for movement along a path. The method includes the steps of: developing a pseudo random sequence of indicia which uniquely define the position of the movable element on the path; generating a pseudo random sequence of information bits which correspond to the indicia; reading the pattern of the N indicia at one particular position of the movable element on the path; cycling the generated pseudo random sequence until N bits thereof equal the pattern of N indicia at one particular position of the movable element on the path; and when equality is obtained, generating a logic signal indicating that the pseudo random sequence has been cycled to a position correlated to the absolute position of the movable element on the path. Preferably a counter is cycled in synchronism with the cycling of the pseudo random sequence so that when equality is obtained the counter will contain a number which is indicative of the absolute position of the movable element on the path. The apparatus includes electrical circuits for carrying out the method steps.

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Chagrin Falls, OH, United States of America

Ronald Duane Elms