High speed printing system

Details High speed printing system High speed printing system

B - Operations, Transporting

41

J

197/78

B41J 1/32 (2006.01) B41J 7/94 (2006.01)

Patent

CA 1150658

- 37 - HIGH SPEED PRINTING SYSTEM ABSTRACT OF THE DISCLOSURE The present invention relates to a high speed printing system, in which the printing intensity of each type element, applied onto a record media, is varied in accordance with the size of the surface area of the type element. The system employs a double control mode, in each hammering operation, for carrying out the variation of the printing intensity. The double control mode is comprised of a first control mode and a second control mode, which follows immediately after the first control mode. In the first control mode, a maximum energizing current is supplied to a hammer means, comprised of a dc motor, for hammering a selected type element to produce a desired character on the record media, and; then, in the second control mode, an energizing current is applied to the hammer means. The latter energizing current has variable peak amplitude which is suitable for carrying out fine control of the printing intensity in accordance with the size of the surface area of each type element.

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