Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1993-04-30
1997-04-15
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 32, B41J 2165
Patent
active
056214413
ABSTRACT:
Wiping and capping method and apparatus for use with an inkjet printer are described. The apparatus includes a sled that is mounted to a printer's chassis. Caps and wipers can be mounted on the sled for each of the printer's movable carriage-mounted printheads. The sled and the chassis are cam-coupled for controlled, relative movement therebetween. The sled and the carriage are also cam-coupled for controlled, relative movement therebetween. Movement of the carriage produces slight vertical and lateral movement of the sled out of its nominal position to place it in three primary positions relative to the carriage: an elevated position for capping the printheads, an intermediate position for wiping the printheads and a lowered position for free reciprocal movement of the carriage without interference between the printheads and either the caps or the wipers. The sled is mounted to ensure constant capping force between the caps and their corresponding printheads. The invented method involves uncapping the printheads, wiping the printheads uni-directionally, lowering the sled to its free position beneath the printheads, optionally re-wiping the printheads repeatedly, and returning the printheads to their capped position. The method and apparatus are compatible with automatic failure recovery techniques to unclog printheads, including spitting and priming. The structure according to the invention can be easily and quickly assembled and disassembled by a method according to the invention.
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U.S. Pat. Appln. S/N 07/949,197, "Inkjet Printhead Capping And Wiping Method And Apparatus," William S. Osborne, filed Sep. 21, 1992.
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Osborne William S.
Waschhauser Heinz H.
Fuller Benjamin R.
Hewlett--Packard Company
Yockey David
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