Lubrication Delivery Method for Print Hammers
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
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.