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Printing Curved Lines With a Daisy Wheel Printer

IP.com Disclosure Number: IPCOM000047977D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Goff, W: AUTHOR [+4]

Abstract

Graphic printing, including both curved and straight lines, with a daisy wheel printer is accomplished by (1) providing a print hammer with a selectively rotatable bar-like head and (2) omitting a number of petals from a print wheel for direct printing with the head. Print wheel 1 is connected via hub 2 and axle 3 to a selection motor 4. Selection motor 4 rotates print wheel 1 in the desired angular position of the selected character. For printing, hammer missile 5 of hammer 6 is caused to strike the impact side 8 of petals 7. Impact side 8 of each petal has a groove for accepting a straight bar-like truncated wedge-shaped head 9 on hammer missile 5. Head 9 is designed to be used as bar-like segment print type for printing curves.

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Printing Curved Lines With a Daisy Wheel Printer

Graphic printing, including both curved and straight lines, with a daisy wheel printer is accomplished by (1) providing a print hammer with a selectively rotatable bar-like head and (2) omitting a number of petals from a print wheel for direct printing with the head. Print wheel 1 is connected via hub 2 and axle 3 to a selection motor 4. Selection motor 4 rotates print wheel 1 in the desired angular position of the selected character. For printing, hammer missile 5 of hammer 6 is caused to strike the impact side 8 of petals 7. Impact side 8 of each petal has a groove for accepting a straight bar-like truncated wedge-shaped head 9 on hammer missile 5. Head 9 is designed to be used as bar-like segment print type for printing curves. Print wheel 1 has an area 10 free of print petals through which head 9 directly strikes a ribbon and print media (not shown). Missile 5, with integral head 9, is rotatable through 180 degrees about hammer axis 11 to match the different slopes of the curve to be printed in segments of the length of head 9. Rotation of hammer missile 5 is performed via, e.g., a stepper motor 12. Stepper motor 12 is connected with the hammer missile 5 by a sliding connection 13 which allows sliding motion along axis 11 while performing rotational selection movement for head 9. When normal printing is performed, head 9 is located in position for communicating with the groove in impact side 8. Controlling carr...