Image-edge-printing controller

Details Image-edge-printing controller Image-edge-printing controller

1990-05-07

1992-10-13

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 33R, 346140, 364519, 400121, B41J 201

Patent

active

051554992

ABSTRACT:
A print head, formed with spaced linear subheads of jet nozzles, prints all of the lines or image element rows on a print medium such as a sheet of paper by scanning along the face of the sheet. The head is advanced between scans by an equivalent number of lines generally equal to the number of nozzles in the head, whereby all print lines are addressed only once. Apparatus for printing includes the use of pointers in registers to keep track of head structure and location on a print medium for calculating print addresses. A partial page memory is used which wraps around to the beginning from the end. An edge sequence control logic circuit modifies the print data so that nozzles not over the image area do not print. A positive printer carriage position encoder uses an index marker located in the middle of a strip of incremental markers. Sensing of the index marker resets an up/down counter with a value that gives a positive value for all count conditions.

REFERENCES:
patent: 4059183 (1977-11-01), Hoskins
patent: 4567570 (1986-01-01), Peer
patent: 4769648 (1988-09-01), Kishino
patent: 4978971 (1990-12-01), Goetz

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