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Screen Wheel Print Mechanism for Typewriters and Printers

IP.com Disclosure Number: IPCOM000043533D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Long, TH: AUTHOR [+2]

Abstract

A screen print wheel 1 (Fig. 1), which is made of stainless steel mesh or the like, has its plastic hub 2 attached to a hub 3 of a selection motor 4. Activation of the selection motor 4 positions one of the petals 5 (Fig. 3) of the screen print wheel 1 at a print position. Each of the petals 5 has one of the various characters for printing thereon. When the petal 5 of the screen print wheel 1 has been selected through the motor 4 (Fig. 1) positioning the petal 5 (Fig. 3) at the print position, energization of a solenoid 6 (Fig. 2) causes an extension arm 7 to move a felt tip 8 of an ink cartridge 9 against the petal 5 at the print position. A spring 10 continuously urges the ink cartridge 9, which is mounted in a holder 11, away from the path of rotation of the screen print wheel 1 (Fig. 1). When the petal 5 (Fig.

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Screen Wheel Print Mechanism for Typewriters and Printers

A screen print wheel 1 (Fig. 1), which is made of stainless steel mesh or the like, has its plastic hub 2 attached to a hub 3 of a selection motor 4. Activation of the selection motor 4 positions one of the petals 5 (Fig. 3) of the screen print wheel 1 at a print position. Each of the petals 5 has one of the various characters for printing thereon. When the petal 5 of the screen print wheel 1 has been selected through the motor 4 (Fig. 1) positioning the petal 5 (Fig. 3) at the print position, energization of a solenoid 6 (Fig. 2) causes an extension arm 7 to move a felt tip 8 of an ink cartridge 9 against the petal 5 at the print position. A spring 10 continuously urges the ink cartridge 9, which is mounted in a holder 11, away from the path of rotation of the screen print wheel 1 (Fig. 1). When the petal 5 (Fig. 2) is at the print position and the solenoid 6 is energized, the felt tip 8 is driven into the petal 5 whereby ink is transferred through the petal 5 onto a sheet 11' of paper, which is supported on a platen 12 and behind a card holder
13. A spring 14 returns the extension arm 7 to its non-biasing position when the solenoid 6 is de-energized. This enables the spring 10 to return the felt tip 8 to its initial position away from the path of rotation of the screen print wheel 1 (Fig. 1).

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