Printing method and apparatus

Typewriting machines – Key-board or key lever-actuating mechanism – Key-board having multiple-character – multiple-movement keys

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Details

40012001, 400634, 347 28, B41F 1312

Patent

active

054543193

ABSTRACT:
A printing method and apparatus clamps a sheet of printing paper at a first position of a drum supplied with the printing paper. The printing paper is released from a clamped state at a second position just in front of an initial printing position. While unclamped, the leading edge of the printing paper is transferred to the initial printing position, so that printing is started from the leading edge and the printing paper is again clamped at a third position which is located beyond the initial printing position. Therefore, printing is performed from the leading edge of the printing paper, which results in printing without any margins. Also, a plate spring presses the printing paper toward the drum just in front of the printing position where the print head, applies pressure for printing. The plate spring elastically applies pressure to the printing paper to transfer the printing paper to the printing position while in contact with the drum.

REFERENCES:
patent: 4552470 (1985-11-01), Yana et al.
patent: 4594597 (1986-06-01), Liu et al.
patent: 4679953 (1987-07-01), Sone et al.
patent: 5001498 (1991-03-01), Shimizu et al.

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