| 摘要 |
The printer includes a plurality of print wheels coaxially mounted for rotation about a common shaft and each including a metal disc provided with circumferentially spaced, embossed character bearing print members located at the disc periphery, and a plurality of pivotally mounted print hammers each having an anvil with a hammer surface which is selectively urgeable against its associated embossed character to produce at a print station, a character imprint on a record medium interposed along with a carbon ribbon between the hammer and the print wheel. One form of hammer includes an anvil which is pivotally mounted to the hammer body for the purpose of automatically compensating, every imprinting cycle, for nonparallelism between the hammer surface of the anvil and the plane of the embossed character at the point where they engage in imprinting relationship. Another form of hammer includes an anvil whose orientation can be selectively and permanently adjusted to eliminate nonparallelism between the hammer surface and a given character plane. Adjustment is accomplished by plastically deforming a wire which controls the orientation of the anvil relative to the hammer body. A method of fabricating the print wheels is disclosed which includes a placing holes at the center of the disc as well as at index points associated with the print member receiving positions whereat the print members are formed; mounted the disc in a molding device having a center post, an index post and a print member forming, or molding, cavity with the center and index posts engaging the center hole and an index hole, respectively, and with the print member receiving position of the disc positioned within the molding cavity; and introducing molten molding material into the cavity to form the print member at the print member receiving position inserting within the cavity.
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