Daisy wheel printer

Details Daisy wheel printer Daisy wheel printer

1981-07-02

1983-05-31

Sewell, Paul T.

Typewriting machines

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

Including type-faces movable relative to type-face-carrier

400174, B41J 130

Patent

active

043858473

ABSTRACT:
A daisy wheel printer having a daisy wheel (10) with a central disc portion (12) and character stalks (14), wherein a masking disc (20) is attached coaxially to the daisy wheel, the mask being larger than the central disc portion of the wheel so that it obscures the daisy wheel stalks in a radial zone of the wheel inwardly of the character petals (16). The mask (20) is provided with a single slit (26) over the interstice between a unique pair of character stalks (14A, 14B), to thereby define a unique datum or home location on the daisy wheel. This datum slit is detected by means of a light source (28) and light-sensitive detector (30) which emits a pulse each time the datum slit passes through a light beam directed towards the detector at the radial zone of the daisy wheel whereat the datum slit is provided. The invention provides a datum slit enabling optical detection of a datum location on the daisy wheel without in any way affecting the performance of the daisy wheel for printing and, in particular, without affecting the flexibility of the character stalks.

REFERENCES:
patent: 3651916 (1972-03-01), Becchi
patent: 4018639 (1977-04-01), Staples
Xerox, Disc. Bulletin, by Mario G. Plaza, vol. 4, No. 3, May/Jun. 1979, pp. 413-414.

Affiliated with

Also associated with

Rating

Daisy wheel printer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Daisy wheel printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Daisy wheel printer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2244284