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Browse Prior Art Database

End-Of-Ribbon Sensor and Cartridge Present Indicator

IP.com Disclosure Number: IPCOM000044279D
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Jenkins, WM: AUTHOR

Abstract

Optical end-of-ribbon sensors do not work well with MYLAR*-backed ribbon and may not sense the presence of a ribbon cartridge. These problems can be overcome by the end-of-ribbon sensor and cartridge-present indicator assembly shown in exploded view in Fig. 1, assembled in Fig. 2 and in conjunction with a ribbon cartridge in Fig. 3. The switch 1 is assembled in a mounting block 2. As the switch 1 enters the cavity 3 in the mounting block 2 the switch encounters dimples 4. Encountering the dimples 4 causes the leafs 5 to flex. This allows the switch 1 to enter the cavity 3 until the dimples 4 engage holes 6, in switch 1. When the dimples 4 snap into holes 6 the switch 1 is properly positioned and secured in cavity 3.

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End-Of-Ribbon Sensor and Cartridge Present Indicator

Optical end-of-ribbon sensors do not work well with MYLAR*-backed ribbon and may not sense the presence of a ribbon cartridge. These problems can be overcome by the end-of-ribbon sensor and cartridge-present indicator assembly shown in exploded view in Fig. 1, assembled in Fig. 2 and in conjunction with a ribbon cartridge in Fig. 3. The switch 1 is assembled in a mounting block 2. As the switch 1 enters the cavity 3 in the mounting block 2 the switch encounters dimples 4. Encountering the dimples 4 causes the leafs 5 to flex. This allows the switch 1 to enter the cavity 3 until the dimples 4 engage holes 6, in switch 1. When the dimples 4 snap into holes 6 the switch 1 is properly positioned and secured in cavity 3. A cartridge-present lever 7 and an end-of-ribbon lever 8 are mounted on post 9 of the mounting block 2 assembled with switch 1, cartridge- present lever 7 and end-of-ribbon lever 8. Spring 11 is attached to spring hook 13 of the cartridge-present lever 7 and to mounting block 2 to cause surface 14 of cartridge-present lever 7 to contact surface 15 of the ribbon lever 8 and to rotate both lever 7 and lever 8 until surface 16 of lever 8 contacts leaf 17 of switch 1. When leaf 17 of switch 1 is contacted, an indication is sent to the control panel which informs the operator that either no cartridge is present or an end of ribbon has been reached. Fig. 3 shows the end-of-ribbon sensor and cartridge-pres...