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Browse Prior Art Database

Multiple Character Set Print Wheel

IP.com Disclosure Number: IPCOM000047779D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Goff, W: AUTHOR [+2]

Abstract

Selection times and operations are reduced and print speeds are increased with a multiple character set print wheel having characters arranged on concentric circles such that whole words, or multiple character portions of words, are formed radially. Printing is performed in back-printing mode and in the 3 o'clock or 9 o'clock position as a function of font design. Figs. 1 and 2 depict a plate 1 containing nine concentric rings 2 of characters 3. Plate 1 is attached to a selection device 4 which, in turn, is secured to an arm 5. Selection device 4 rotates plate 1 in the direction of arrow 6 to bring the selected character 3 on one of the rings 2 in alignment with hammer 7 of hammer unit 8 in print line 9. Hammer unit 8 might contain several hammers 7 distanced the same amount as the rings 2 are distanced radially.

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Multiple Character Set Print Wheel

Selection times and operations are reduced and print speeds are increased with a multiple character set print wheel having characters arranged on concentric circles such that whole words, or multiple character portions of words, are formed radially. Printing is performed in back-printing mode and in the 3 o'clock or 9 o'clock position as a function of font design. Figs. 1 and 2 depict a plate 1 containing nine concentric rings 2 of characters 3. Plate 1 is attached to a selection device 4 which, in turn, is secured to an arm 5. Selection device 4 rotates plate 1 in the direction of arrow 6 to bring the selected character 3 on one of the rings 2 in alignment with hammer 7 of hammer unit 8 in print line 9. Hammer unit 8 might contain several hammers 7 distanced the same amount as the rings 2 are distanced radially. Hammer unit 8 and plate 1 are moved along print line 9 in the direction of arrow 10. For this purpose, arm 5 with plate 1 and arm 11 with hammer unit 8 are moved along rods 13 by escapement means (not shown). The escapement means moves arms 5 and 11 in unison when the number of hammers equals the number of rings. Arms 5 and 11 are moved independently when the number of hammers is less than the number of rings. In printing, which is performed in the 9 o'clock position of plate 1, hammer 7 is propelled toward paper 14 and ribbon 15 and the latter is pressed against plate 1 with the selected character in print position. Wi...