Typewriting machines – Means auxiliary to typewriting function – Indicator means
Patent
1993-11-01
1995-03-14
Wiecking, David A.
Typewriting machines
Means auxiliary to typewriting function
Indicator means
4007051, 400279, B41J 2116
Patent
active
053971922
ABSTRACT:
A printing system for a shuttle-type printer includes a platen and a carriage configured to move bidirectionally across the platen. An optically responsive demarcation is provided on the platen outside of the media feed path. A printhead and an optical sensor are disposed on the carriage. During operation, the carriage is operable to position the optical sensor over the platen demarcation, whereby the optical sensor generates a position signal when it detects the platen demarcation. A control subsystem is operably coupled to the optical sensor to determine absolute position of the carriage relative to the platen in response to optical identification of the platen demarcation by the optical sensor. Several methods for operating such a printing system are also described.
REFERENCES:
patent: 4625275 (1986-11-01), Smith
patent: 5127752 (1992-07-01), Courtney
patent: 5150977 (1992-09-01), Yoshikawa
patent: 5170047 (1992-12-01), Beauchamp et al.
patent: 5241325 (1993-08-01), Nguyen
patent: 5299873 (1994-04-01), Miebori
Hewlett-Packard Company Patent Application, "Phase Plate Design for Aligning Multiple Inkjet Cartridges by Scanning a Reference Pattern" Ser. No. 08/055,620 Filed Apr. 30, 1993.
Hewlett--Packard Company
Hilten John S.
Wiecking David A.
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