Printing – Selective or progressive – Bed and platen machines
Patent
1979-10-01
1982-09-07
Coven, Edward M.
Printing
Selective or progressive
Bed and platen machines
4001442, 4001443, 4001573, 400166, B41J 792
Patent
active
043477860
ABSTRACT:
In an impact printer including a print wheel having a plurality of selectable character type bearing elements for respectively printing a plurality of characters, said print wheel being rotatable for selectively positioning selected type elements in successive print positions, impact means impellable against the selected elements to drive said elements against the printing medium and means for impelling the impact means against said selected type element, the present invention provides the improvement comprising means for sensing the flight time of the impelled impact means until impact by sensing variations in velocity of said impact means and means responsive to said sensed flight time for controlling the impelling means to vary the flight time. In accordance with another aspect of the present apparatus, means are provided for detecting the coincident engagement of the impact means with a type element by also sensing the velocity of the impact means after the impact means has reached a predetermined coincident engagement position.
REFERENCES:
patent: 3490010 (1970-01-01), Bernard et al.
patent: 3574326 (1971-04-01), Koehn
patent: 3740615 (1975-06-01), Vigini
patent: 3840105 (1974-10-01), Kittredge
patent: 3858509 (1975-01-01), Grundherr
patent: 3988664 (1976-10-01), Beery et al.
patent: 4035781 (1977-07-01), Chang
patent: 4103617 (1978-08-01), O'Brien et al.
patent: 4103766 (1978-08-01), Ruble et al.
patent: 4147438 (1979-04-01), Sandrone et al.
patent: 4173927 (1979-11-01), Van Kempen et al.
patent: 4189246 (1980-02-01), Kane et al.
patent: 4192230 (1980-03-01), Blom et al.
Deetz, Xerox Discl. Journal, vol. 4, No. 2, Mar./Arp. 1979, p. 153.
IBM Tech. Discl. Bulletin, Mills et al, vol. 15, No. 8, Jan. 1973, p. 2356.
Mathews, IBM Tech. Discl. Bulletin, vol. 21, No. 12, May 1979, p. 4763.
Sweat, Jr. Robert H.
Thornhill William J.
Coven Edward M.
International Business Machines - Corporation
Kraft J. B.
LandOfFree
Impact printer hammer flight time and velocity sensing means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impact printer hammer flight time and velocity sensing means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impact printer hammer flight time and velocity sensing means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1337549