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Automatic Paper Bail Closer

IP.com Disclosure Number: IPCOM000051896D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Barrett, MC: AUTHOR [+3]

Abstract

This automatic paper bail closer allows uninterrupted printing without operator intervention from the first writing line at the top of the sheet of paper to the bottom of the sheet. For printing at the top of the sheet and on a predetermined number of lines thereafter, the paper bail is open. After a predetermined number of lines have been printed the bail is automatically closed to provide firm contact of the paper and the platen and to assure that the top of the sheet is properly guided out of the printer.

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Automatic Paper Bail Closer

This automatic paper bail closer allows uninterrupted printing without operator intervention from the first writing line at the top of the sheet of paper to the bottom of the sheet. For printing at the top of the sheet and on a predetermined number of lines thereafter, the paper bail is open. After a predetermined number of lines have been printed the bail is automatically closed to provide firm contact of the paper and the platen and to assure that the top of the sheet is properly guided out of the printer.

In the figure, the dashed lines show the position of the components in the open position, while the solid lines show the component positions in the closed position. Initially, the paper is rolled into the printer and positioned around the platen to allow printing at the very top of the paper. The paper bail is left open to allow the paper to move up between the platen and the paper bail. Printing is initiated. After a predetermined number of net forward index operations have taken place, the solenoid plunger is drawn down to the closed position, with the attached bellcrank following. The geometry of the bellcrank arm is such that motion is greater at the transfer link arm than at the solenoid arm. At the attachment point between the bellcrank and the link is an eccentric shoulder screw which is slidable in a slot in the transfer link. The solenoid plunger reaches its closed position before the paper bail rollers reach the platen, d...