Browse Prior Art Database

Composite Material Hammer Damper for Print Actuator Assembly

IP.com Disclosure Number: IPCOM000037403D
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Patterson, WA: AUTHOR

Abstract

A composite hammer damper formed of a matrix of an elastomeric material is shown in the Figures.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Composite Material Hammer Damper for Print Actuator Assembly

A composite hammer damper formed of a matrix of an elastomeric material is shown in the Figures.

Referring to Figure 1, the ballistic missile assembly 1 includes a missile shaft 2, a hammer 3, a hammer damper 4 and a hammer adjustment screw 5. In operation, the missile shaft is activated by a rotor 6 or similar actuating device and an actuation hammer 3 impacts the print band 7. After impact the hammer 3 and the missile shaft 2 are brought to rest by the hammer damper 4.

Hammer dampers are typically made of a solid rubber. However, rubber tends to crack and chemically break down into a gelatinous mass due to the forces exerted thereon where the hammer strikes the damper. This deterioration of the rubber results in a decline in the performance of the hammer and thus leads to poor print quality.

The hammer damper of the invention is made of a composite as illustrated in Figure 2. Rubber R, such as polyacrylic rubber or butyl rubber, is employed as a matrix, and a thermally conductive material TCM, such as particles of aluminum, is compounded into the rubber. The thermally conductive material serves to dissipate the heat generated during damping which reduces the tendency of the rubber to break down physically or chemically. Additionally a tough skin S of a woven material, such as silk, is attached to the exterior surface of the damper so as to provide reinforcement to the damper.

Disclosed anonymously.

1

...