Browse Prior Art Database

Printer Ribbon Lift Means

IP.com Disclosure Number: IPCOM000053038D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Goff, W: AUTHOR [+2]

Abstract

A structure is provided which gives a unique ribbon lift expedient for multiple path usage of a MYLAR* substrate ribbon for impact printers. The ribbon mechanism is not carrier mounted but is grounded to the printer frame. Consequently, it is suitable for high speed printing. Because of the structural expedients, there is the absence of any physical connection between the ribbon lift structure and the control and/or actuation means for the ribbon lift. As a result, there is a significant reduction of carrier inertia.

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Printer Ribbon Lift Means

A structure is provided which gives a unique ribbon lift expedient for multiple path usage of a MYLAR* substrate ribbon for impact printers. The ribbon mechanism is not carrier mounted but is grounded to the printer frame. Consequently, it is suitable for high speed printing. Because of the structural expedients, there is the absence of any physical connection between the ribbon lift structure and the control and/or actuation means for the ribbon lift. As a result, there is a significant reduction of carrier inertia.

The ribbon lift structure 1, shown in the above figure, has ribbon guides or locating means attached at position 2, guided by pins 3 and biased downward by springs 4 such that projections 5 rest on slider 6. Slider 6 has cam surfaces 7 and drive teeth 8 and is retained to the carrier by shoulder screws 9 and spring biased as shown by 10. A pivot pin 11, integral with the carrier, is provided about which a pawl carrier 12 and check pawl 13 are biased to stop 14 under bias of springs 15 and 16. Pawl carrier 12 carries drive pawl 17 and its associated restore spring 18, the surface 19 of pawl carrier 12 being the impact point for interposer 20 when selected. Both pawls 13 and 17 are released by operator depression of restore button 21 whenever the ribbon is changed or print line visibility is desired; the latter function requires suitable means (not described) for restoring the ribbon to the correct print track. * Trademark of...