Character printing device with pressure impact control

Details Character printing device with pressure impact control Character printing device with pressure impact control

1992-04-27

1993-04-13

Eickholt, Eugene H.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Imprint by pivoting of type-head-carrier and type-head...

400497, 400697, B41J 134

Patent

active

052015912

ABSTRACT:
An impact-type printing device includes a printer for printing characters with a plurality of impression pressures including a high impression pressure sufficient for printing on all of the sheets of a set of copy sheets. The device also include a keyboard having a key for selecting one of the plurality of impression pressures when the device operates in a normal operation mode. The device further includes a switch for switching the device between the normal operation mode and a copy mode of operation. In the normal mode the printer is capable of printing in any of the plurality of impression pressures selected by the operator at the keyboard. In the copy mode the printer prints only with a high pressure, sufficient for printing on all of the sheets of the set of copy sheets. The device also erases a previously printed character when in the normal mode and overstrikes the previously printed character in the copy mode.

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"Typewriter Print Impression Control" IBM Technical Disclosure Bulletin, vol. 24, No. 8, Jan. 1982, pp. 4316-4317.
"Printer Impact Control" IBM Technical Disclosure Bulletin, vol. 18, No. 11, Apr. 1976, pp. 3533-3534.
"Electronic Control of Print Impact in Single-Element Typewriters" IBM Tech. Discl. Bulletin vol. 21, No. 10, Mar. 1979, pp. 4110-4112.

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