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Simple Compression Damper With Fixed Start Position

IP.com Disclosure Number: IPCOM000041186D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Misenheimer, LP: AUTHOR [+2]

Abstract

To attain high print speeds using a linear actuator, it is essential that the print actuator be damped as quickly as possible on the return stroke. It is also a requirement that the actuator assembly be positioned with tight tolerances in respect to the housing block by adjustment of the return spring damper assembly.

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Simple Compression Damper With Fixed Start Position

To attain high print speeds using a linear actuator, it is essential that the print actuator be damped as quickly as possible on the return stroke. It is also a requirement that the actuator assembly be positioned with tight tolerances in respect to the housing block by adjustment of the return spring damper assembly.

This invention, comprised of a compression damper with a fixed start position, achieves those results. Additional objectives achieved with this invention are simple design and the magnetomotive force required to overcome static forces in the rest position are minimized.

Referring to the figure, damper 1 is positioned in housing 2 to absorb the recoil energy produced when slider assembly 3 is fired. Housing 2 has block 4 for positioning damper 1. Damper 1 is comprised of a rigid plate 6 constructed of stainless steel affixed to a highly non-resilient elastomeric block 12 such as Butadiene or Isobutylene. When damper 1 is struck by slider bumper 5, rigid plate 6 deforms in the direction of block 4 causing the elastomeric material to expand into the vacant regions 7 of block 4. The excess kinetic energy of slider 3 is absorbed by the damper 1 and when rigid plate springs back into position it will always be located in the same starting position. The force exerted by return spring 8 is slightly greater than that required to compress the elastomeric block.

Disclosed anonymously.

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