Typewriting machines – Including adjustment for optimum printing plane – By adjustment of carriage
Patent
1990-10-11
1992-03-10
Eickholt, Eugene H.
Typewriting machines
Including adjustment for optimum printing plane
By adjustment of carriage
400126, 4006363, 346 75, 101 9311, B41J 1120
Patent
active
050945548
ABSTRACT:
Letter quality addressing is possible at production speeds. A feeding and transport system positively feeds discrete media elements to be addressed (such as envelopes) past a number of print heads in a positive manner to maintain consistent and proper alignment of the printed text on the media elements. First and second feed rollers feed the media elements to a pair of pinch rollers, the operation of the first roller being interrupted once a media element reaches a predetermined position. A selector bar with abrasive strips is associated with the second feed roller. The pinch rollers feed the media elements onto endless transport belts, with transport wiper plates disposed on top of the belts to hold the media elements in contact with the belts. The transport wipers comprise plates mounted by levers at opposite ends in such a way that an element may easily move under a plate, but is held tighter by the plate as it moves along it. At the end of the transport belts, an exit roller holds the envelopes generally horizontal until they have almost completely cleared the belts, so that they do not smear previous envelope addresses. The print heads preferably are ink jet print heads having the orifices thereof mounted at about an 87.degree. angle with respect to the horizontal. The print heads may have the vertical spacing from the media elements adjusted simultaneously with the adjustment of the spacing of the selector bar from a second feed roller, and are mounted on carriages for horizontal adjustment.
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"Spring Loaded Round Platen", IBM Tech. Discl. Bulletin, vol. 26, No. 4, 9/83, pp. 1834-1835.
Eisner Lawrence F.
Hurd Bruce E.
Bryce Office Systems Inc.
Eickholt Eugene H.
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