Incremental printing of symbolic information – Ink jet – Medium and processing means
Patent
1995-05-30
1998-06-23
Le, N.
Incremental printing of symbolic information
Ink jet
Medium and processing means
347101, 346138, B41J 201
Patent
active
057710546
ABSTRACT:
An ink jet printing system utilizes a heated rotary printing drum for mounting and carrying paper to be printed by one or more thermal ink jet printheads to achieve black or full color printing at high speed. As printing and drying are achieved prior to any transfer of the sheet from the drum, smudging of images is prevented. Such a printing system is capable of producing dried prints that can be immediately stacked and handled without smudging using slow-drying black inks and fast-drying color inks at speeds exceeding 10 pages per minute for color and 20 pages per minute for monochrome black text or images. Hold down of the sheet onto the drum can be achieved using vacuum or electrostatic forces to precisely retain the sheet on the drum until printing and drying are completed. Partial tone printing on multiple passes of the heated drum is provided to eliminate mottle on large solid areas. Heating of the drum can be performed internally or externally.
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Dewar Vaughan Louis
Dudek Lesley P.
Ferringer Michael C.
Ims Dale R.
Le N.
Tran Thien
Xerox Corporation
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