Original Publication Date: 1972-Jan-01
Included in the Prior Art Database: 2005-Feb-24
Setting wedge-shaped type in type wheels is difficult because over-tightening of the clamps holding the type tends to effect an outward wedging action on the type, causing it to be displaced which results in uneven type face, or total displacement of the type from its setting.
Setting wedge-shaped type in type wheels is difficult because over- tightening of the clamps holding the type tends to effect an outward wedging action on the type, causing it to be displaced which results in uneven type face, or total displacement of the type from its setting.
The type wheel 10 includes central bore 11 in which is mounted a shaft for effecting rotation to the wheel. Wheel 10 is adjustably bushed by bushing 12 to the shaft to permit proper setup of the wheel relative to items intended for printing. The wheel includes a plurality of type receiving cavities 13 circumferentially spaced about its periphery. The type receiving cavities have an enlarged portion 13A which is filled with high-durometer rubber 14, the radially extending edges of cavity 13 being bisected by cylindrical rubber inserts 15 which aid in centralizing the type. The type is held in place by overlying clamps 16 having polyurethane or other resilient plastic 17 on the portion engaging the type, the polyurethane tending to inhibit the squeezing out of the type when the clamp is secured to the wheel by screws 18. As illustrated in Fig. 2, the lower surface of cavity 13 also utilizes a polyurethane insert 17A to inhibit the squeezing action of the type from the cavity when the clamps are tightened. The resilient material 14 located in the enlarged portion 13A of cavity 13 permits the uniform location of the type at its outer surface, so that new and old type may be used in...