Browse Prior Art Database

Automatic Left Margin Setting and Resetting

IP.com Disclosure Number: IPCOM000092811D
Original Publication Date: 1967-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 74K

Publishing Venue

IBM

Related People

Datilo, AJ: AUTHOR [+2]

Abstract

The printing apparatus has provision for automatic setting and resetting of margin stops to control paragraph indentation.

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Automatic Left Margin Setting and Resetting

The printing apparatus has provision for automatic setting and resetting of margin stops to control paragraph indentation.

Platen 1 holds document 2 having paragraph areas A, B, and C required to be printed. Associated with platen 1 is single element print head 3 that is selectively rotated and tilted, then driven as indicated by arrow 4 against ribbon 5 to effect printing of characters. Platen 1 remains stationary, except for line spacing, and head 3 is mounted on carrier 6 for movement along shaft 7 longitudinally of platen 1. Tab mechanism 8 has tab stops 9, 10, and 11 that are selectively settable for tabulating positions on document
2. A left margin stop 12 determine s the ma rgin 5 for paragraph A.

Stops 9 and 11 are set for tabulation to paragraphs 13 and C respectively. Stop 10 is in a reset condition. Stops 9, 10, and 11 control indentation of head 3 in a conventional manner when moved from left to right in a tabulating direction. Mounted on a left margin rack 13 are three left margin stops 14, 15, and 16 for controlling the stopping of head 3 when moving in the carrier return direction from right to left. Stop 14 is shown in detail at B, C, D, and E. Stop 14 is normally maintained in a reset condition, as shown at E, by cam portion 19a on latch 19. Carrier 6 has a set-reset extension 20 and a left margin pawl 21. Extensions 20 and 21 do not normally encounter any of the stops 14, 15, or 16 when in the reset condition during movement of carrier 6.

In operation, during the printing of paragraph A, none of the left margin stops 14, 15, or 16 is set. When the typing of paragraph A is completed, two carrier return operations return head 3 to the left...