Browse Prior Art Database

Automatic Ribbon Tension

IP.com Disclosure Number: IPCOM000039357D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Rachui, RA: AUTHOR [+2]

Abstract

A method of eliminating the slack generated in the ribbon when the cartridge of an IBM QuietWriter printer is unloaded so that the operator will not be required to do it manually. When an operator wants to remove the ribbon cartridge from a IBM QuietWriter printer, he must first rotate the ribbon load lever on the carrier approximately 50 degrees in a clockwise direction. This action retracts the printer head, releases the ribbon from the pinch brake and metering roll, retracts the two shock arms, and releases the cartridge from the ribbon plate. The ribbon cartridge can then be lifted straight up and removed from the machine easily.

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Automatic Ribbon Tension

A method of eliminating the slack generated in the ribbon when the cartridge of an IBM QuietWriter printer is unloaded so that the operator will not be required to do it manually. When an operator wants to remove the ribbon cartridge from a IBM QuietWriter printer, he must first rotate the ribbon load lever on the carrier approximately 50 degrees in a clockwise direction. This action retracts the printer head, releases the ribbon from the pinch brake and metering roll, retracts the two shock arms, and releases the cartridge from the ribbon plate. The ribbon cartridge can then be lifted straight up and removed from the machine easily. However, there is an excessive amount of ribbon looping out of the cartridge when it is removed and the operator must manually rotate the ribbon advance knob on the cartridge to remove this undesirable slack before either storing the ribbon cartridge or placing it back into the machine. Ribbon drive failures can result if the cartridge is loaded with the slack ribbon protruding from the cartridge. As shown in Fig. 1, this requires the addition of gear teeth to the periphery of the ribbon take-up spindle drive pulley 1 and mounting a compound gear containing a one-way clutch 2 on the load lever 3. The larger gear 4 of the compound gear is engaged with the gear teeth on the spindle drive pulley 1 while the smaller gear 5 is meshed with a stationary gear segment 10 attached to the bottom of the ribbon plate 6. W...