Browse Prior Art Database

Selective Bail Pressure

IP.com Disclosure Number: IPCOM000049507D
Original Publication Date: 1982-Jun-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Kroeker, EB: AUTHOR

Abstract

In a particular printer adapted to selectively print both cut sheets and envelopes it has been found that the envelopes require higher pressure bail loading than cut sheets. This article describes a simple mechanism for increasing bail pressure against the platen to transport an envelope.

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Selective Bail Pressure

In a particular printer adapted to selectively print both cut sheets and envelopes it has been found that the envelopes require higher pressure bail loading than cut sheets. This article describes a simple mechanism for increasing bail pressure against the platen to transport an envelope.

In the figure platen 2 is shown, but the printhead and carrier are not. One of a series of paper bail rollers 4 is shown mounted at the end of rod 6 which is pivotally mounted to the machine frame at 8. Bail rod 6 is connected by spring 10 to cam follower 12 which pivots about stud 14 in the machine frame. Document feed cam 16 is provided with high bail lobe 18 so that when magnet 20 is opposite high bail reed switch 26, high bail lobe 18 causes cam follower 12 to pivot clockwise about stud 14, thereby increasing the tension in spring 10, pulling bail roller 4 with greater pressure against platen 2.

High bail reed switch 26 is closed when it is desired to feed an envelope. At other times, switch 26 is open and home reed switch 24 is closed by home magnet 22.

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