Typewriting machines – Including type-set-assemblage mounted on carrier and... – Imprint by movement of record-medium against type-face
Patent
1986-01-16
1988-01-26
Pearson, Charles A.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Imprint by movement of record-medium against type-face
400174, 101 9348, B41J 9133
Patent
active
047214007
ABSTRACT:
This invention provides a hammer unit for use in character printers in which the front end of the plunger of the solenoid operating under control of the print command is positioned directly opposite to and close to the type face of the character head, with the said plunger part being provided with a plunger tip which can be attached to and detached from in a direction perpendicular to the axis of the plunger and which covers the cylindrical face of the plunger and entire circular face of the plunger front end, and with at least the cap part of the plunger tip covering the said front end of the plunger being made of some synthetic resin type material.
According to this invention, when the plunger tip has to be replaced due to wearing out of its cap part, etc., the plunger tip can be replaced easily and quickly by slipping it on and off the plunger along a direction perpendicular to the axis of the plunger. Furthermore, since the print stroke is determined in such a unit by the stroke of the plunger and thickness of the cap part of the plunger tip, the adjustment of the print stroke will be easily done.
REFERENCES:
patent: 3776341 (1973-12-01), Dohner et al.
patent: 4239401 (1980-12-01), Veale
IBM Tech. Disc. Bulletin, "Print Hammer Flight Time Transducer", Pennel et al., vol. 22, No. 8B, Jan. 1980, p. 3673.
IBM Tech. Disc. Bulletin, "Energy Compensation for Dot Printers," Helinski et al., vol. 25, No. 7A, Dec. 1982, pp. 3522-3523.
Hideki Ooike
Mitsushiro Kaneko
Risei Notsu
Fuji System Machines Co., Ltd.
McDaniel James R.
Pearson Charles A.
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