Browse Prior Art Database

Replaceable Dot Matrix Head

IP.com Disclosure Number: IPCOM000043067D
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Kirksey, JR: AUTHOR

Abstract

A dot matrix printhead is removably mounted on a pair of support rods as shown in U.S. Patent 4,256,408. In order to make the printhead easier to remove, the support rods are made to telescope and a latch is provided to hold the support rods in their shortened position when the printhead has been removed from the printer in order to facilitate restoring the printhead to the printer. A printhead 11 is mounted to a carrier 13 which travels on guide rods 15 and 17, as shown in Fig. 1. A pair of telescoping support rods are provided, one on each side of the printhead. Each rod has a pointed forward end 19 which engages a receiving hole near the forward end of the printhead, as shown in U.S. Patent 4,256,408. Likewise, the opposite end 21 of each support rod engages a hole near the actuator end of the printhead.

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Replaceable Dot Matrix Head

A dot matrix printhead is removably mounted on a pair of support rods as shown in U.S. Patent 4,256,408. In order to make the printhead easier to remove, the support rods are made to telescope and a latch is provided to hold the support rods in their shortened position when the printhead has been removed from the printer in order to facilitate restoring the printhead to the printer. A printhead 11 is mounted to a carrier 13 which travels on guide rods 15 and 17, as shown in Fig. 1. A pair of telescoping support rods are provided, one on each side of the printhead. Each rod has a pointed forward end 19 which engages a receiving hole near the forward end of the printhead, as shown in U.S. Patent 4,256,408. Likewise, the opposite end 21 of each support rod engages a hole near the actuator end of the printhead. The forward portion 19 of the mounting rods telescope into the rear portion 21 against the force of spring 23. The rear portions 21 of the telescoping support rods are fixedly mounted to carrier 13, whereas the forward ends 19 are permitted to slide forward and backward against the force of spring 23. The forward end of the support rod includes a flange 25 which engages a latch spring 27 when the printhead has been pulled back and up to disengage the back end of the support rod from the actuator end of the printhead, as shown in Fig. 2. Latch spring 27 is a single piece of sheet metal that is mounted directly beneath the printhead s...