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Automatic Print Impression Control with Manual Override

IP.com Disclosure Number: IPCOM000092809D
Original Publication Date: 1967-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 115K

Publishing Venue

IBM

Related People

Slaughter, GT: AUTHOR

Abstract

The printer has automatic print impression control that can be set up by manual control.

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Automatic Print Impression Control with Manual Override

The printer has automatic print impression control that can be set up by manual control.

Several predetermined velocitie s of print head 1 against document 2 designated high, medium, and low are selected automatically depending upon the character to be printed. Control knob 3 has three settings I, II, and III for recoding the low velocity selection. The printer has three character keybuttons 5, 6, and 7 that select characters requiring high, medium, and low degrees of impression respectively. No Print key 8 prevents printing of characters on document 2. Key 8 is useful during the preparation of draft copie s while initial determination of escapement values of characters is made for justification purposes. Space bar 9 effects incremental spacing of print head 1 adjacent document 2.

Head 1 is mounted on rocker 10 incorporated in carrier 11. Printing is effected by rapidly actuating head 1 toward document 2 under control of print cam 12 having high, medium, low, and no print portions 12a... 12d. Cam 12 acts against cam follower roller 13 mounted in bracket portion 14a of print cam follower 14, pivotally mounted at 15. Portion 14b of follower 14 imparts velocity to rocker 10 according to the print cam portion operating against roller 13. The components are shown separated from one another for clarity. Normally, roller 13 rests adjacent cam 12 and portion 14b of follower 14 rests on the underneath side of rocker 10.

Automatic selection occurs under control of high, medium, and low velocity stops 20, 21, and 22. As an example, depression of keybutton 6 moves interposer 24 downward against cycle bail 25 to trip cycle clutch 26. The latter rotates filter shaft 27 and, with interposer 24 in its downward position, shaft 27 moves interposer 24 to the right. Extensions 24a operate on bails, not shown, to rotate and tilt head 1 for selection of a character. While interposer 24 is moving to the right, it acts against vane 30 attached to bail 31. The latter is connected through bell crank 32 and link 33 to pull high velocity stop 20 downwardly thus rendering medium velocity stop 21 effective. With medium velocity stop 21 selected, impression cam 34 moves cam follower 35 toward stops 20... 22. The extent of movement of follower 35 depends upon the stop 20... 22 selected. Such movement is directed through link 36, bell crank 37, link 38, and pulley lever 3...