Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – Carriage-feed mechanism
Patent
1990-06-26
1991-12-24
Burr, Edgar S.
Typewriting machines
Carriage or carriage-moving or movement-regulating mechanism
Carriage-feed mechanism
400279, B41J 1930
Patent
active
050746901
ABSTRACT:
A printer has a bi-directional stepper motor that drives an endless toothed belt which is secured to a print head carriage for driving the carriage back and forth across the printer along a line of printing. A timing strip is molded integral with the frame of the printer and positioned under the print head carriage. An optical sensor of the light emitting diode and phototransistor type is secured to the underside of the carriage and positioned to straddle the timing strip as the carriage is driven back and forth across the printer. The printer controller uses timing strip/sensor signals to place the print head in a home position when the printer is turned on and also when the print head has been moved from an operating position, e.g. in the case of changing a ribbon. The timing strip/sensor signals are also used to detect a carriage jam condition.
REFERENCES:
patent: 3472352 (1969-10-01), Kondur
patent: 3970183 (1976-07-01), Robinson
patent: 4044881 (1977-08-01), Chai et al.
patent: 4076111 (1978-02-01), Robinson et al.
patent: 4179223 (1979-12-01), Kwan et al.
patent: 4284362 (1981-08-01), Jackson et al.
patent: 4305674 (1981-12-01), Velazquez
patent: 4338035 (1982-07-01), Kondo et al.
patent: 4340848 (1982-07-01), Hanagata
patent: 4543644 (1985-09-01), Kozima et al.
patent: 4602882 (1986-07-01), Akazawa
patent: 4643596 (1987-02-01), Shimada et al.
patent: 4948279 (1990-08-01), Ikoma
patent: 5007751 (1991-04-01), Yamakawa
IBM Technical Disclosure Bulletin, vol. 27, No. 10B, Mar. 1985, p. 6338.
Del Signore, II James R.
Ferrell Paul S.
Maginnity Kathleen
Walker Alan H.
Burr Edgar S.
Kelley Steven S.
Muckenthaler George J.
NCR Corporation
LandOfFree
Print head carriage homing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Print head carriage homing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Print head carriage homing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-40192