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Lubrication Delivery Method for Print Hammers

IP.com Disclosure Number: IPCOM000034497D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR

Abstract

Lubricant can be effectively delivered and released over a long period of time and at a controlled release rate to the pivots of print hammers or actuators by providing a lubricant-impregnated pivot block of controlled porosity which is connected to a remote reservoir by a polymer wick. In Figs. 1A and 1B, a pivot block 1 for print hammers is supported on mounting bar 2 and is formed of a porous metal body. The block is formed with integral separators 3 between the hammers having openings 4 to receive a pivot rod on which the hammers oscillate. Openings 5 are for mounting screws. Block 1 is impregnated with lubricant. A supplemental remote lubricant source 8 can be attached to mounting bar 2, as shown in Fig. 2. Source 8 is also porous metal that is impregnated with lubricant and serves block 1 as a reservoir.

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Lubrication Delivery Method for Print Hammers

Lubricant can be effectively delivered and released over a long period of time and at a controlled release rate to the pivots of print hammers or actuators by providing a lubricant-impregnated pivot block of controlled porosity which is connected to a remote reservoir by a polymer wick. In Figs. 1A and 1B, a pivot block 1 for print hammers is supported on mounting bar 2 and is formed of a porous metal body. The block is formed with integral separators 3 between the hammers having openings 4 to receive a pivot rod on which the hammers oscillate. Openings 5 are for mounting screws. Block 1 is impregnated with lubricant. A supplemental remote lubricant source 8 can be attached to mounting bar 2, as shown in Fig. 2. Source 8 is also porous metal that is impregnated with lubricant and serves block 1 as a reservoir. The pores of source 8 are preferably slightly larger than those of block 1 so that the lubricant is given up more readily during use. Lubricant transfer between block 1 and source 8 is through an open cell polymer wick 10 which has a pore structure equal to or finer than that of block 1. Source 8 may optionally be formed with a cavity 13 containing lubricant 15, as in Fig. 3. A wick 10 may be immersed in the lubricant in cavity 13 and would not rely on the clamping or contact of source 8. Vent 14 is provided for cavity 13. To provide controlled release of the lubricant 15, a formulation having a grease base of l...