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High Speed Paper Feed

IP.com Disclosure Number: IPCOM000097664D
Original Publication Date: 1961-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Brandenberg, W: AUTHOR

Abstract

A serial print wheel 11 cooperates with a vertical platen 12 upon which a sheet 13 is secured by vacuum ports. Platen 12 rotates continuously, one revolution per recorded line.

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High Speed Paper Feed

A serial print wheel 11 cooperates with a vertical platen 12 upon which a sheet 13 is secured by vacuum ports. Platen 12 rotates continuously, one revolution per recorded line.

When a sheet 13 advances from a magazine (not shown), feed rollers 14 project it toward 12. In the lower drawing, vacuum port 15 is opened by a valve member 16 so that the leading edge of 13 is clamped to 12. Another port 17 cooperates with 15 to hold both ends of 13 clamped to 12 while printing takes place. A vacuum maintaining means (not shown) operates to exhaust the inner space V of platen 12. Although member 16 controls the initial clamping of 13 to 12, a second valve member 18 controls the constant clamp suction at both port locations as long as printing takes place.

A third valve member 19 controls the sequential application of air pressure at ports 15 and 17. This action dislodges first the front end of sheet 13 and then the final end of 13. This air pressure is introduced through the hollow platen shaft 20 having connection with the air jet openings in 19. A dislodged sheet 13 is grasped by feed rollers 21 and is advanced to the right to a stacker (not shown).

Printing is effected serially by the rapid movement of type wheel 11 by a rack 23 which drives a gear 24 on the wheel 11.

Interspersed with adjustments of rack 23 are short print impression effecting strokes of holder 25. The latter moves 11 to the left against an ink ribbon (not shown) and sheet 13. A...