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Print Wheel Misregistration Protector

IP.com Disclosure Number: IPCOM000048400D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Springer, RF: AUTHOR

Abstract

In order to maintain home position of a typical print wheel of the daisy wheel type, it is desirable that, when the hub of the selection motor (not shown) couples the selection motor to the print wheel, the home position is insured. Moreover, it is also desirable that if for some reason power down occurs during the machine cycle, any attempt to withdraw the selection motor will not destroy either the print wheel or its retaining cartridge. Disclosed is a means for inhibiting damage to the hub and the print wheel while protecting against misregistration of the hub and print wheel.

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Print Wheel Misregistration Protector

In order to maintain home position of a typical print wheel of the daisy wheel type, it is desirable that, when the hub of the selection motor (not shown) couples the selection motor to the print wheel, the home position is insured. Moreover, it is also desirable that if for some reason power down occurs during the machine cycle, any attempt to withdraw the selection motor will not destroy either the print wheel or its retaining cartridge. Disclosed is a means for inhibiting damage to the hub and the print wheel while protecting against misregistration of the hub and print wheel.

Turning now to the drawing, and especially Fig. 1, the selection motor shaft 10 is shown connected to a hub 15 which includes a slot or the like 17 in a circular flange-like portion 16. A hub arm 18 includes a nipple-like projection 19 thereon which registers with an aperture 20 on the print wheel 21. The hub arm 18 mates with a key slot opening 23 in a print wheel carrier 24 when the home registration of the print wheel with the hub 15 occurs. As illustrated, the print wheel carrier 24 mates with a disc bucket 25 which is positioned within the machine.

In operation, the motor shaft pushes the hub 15 forward so that the thin hub arm fits between the carrier 24 and the print wheel 21, allowing rotation of the print wheel upon rotation thereof. It was found that if power went off in the position illustrated in Fig. 2, and the operator attempted to with...