Sonia Pakistani Call Girl Lahore, Call Girls number, Girls number For Friendship. karachi girls number, New Pakistani Girls Numbers, Pakistani Girls Mobile .Dot matrix and line printers are relatively low-cost, high speed alternatives to the more expensive impact printers. For example, dot matrix printers typically cost about ten to twenty percent less than impact printers. Line printers cost about forty to fifty percent less than impact printers. Due to the economics of dot matrix and line printers, it would be desirable to produce a low cost printer which has a high speed capability.
An example of a dot matrix printer is found in U.S. Pat. No. 4,108,185. This patent discloses a dot matrix printer in which a printing mechanism is located at the end of a carriage. The mechanism includes an impact transfer member. The mechanism is reciprocated across a print medium, for example a paper feeder, so as to print on the paper. A paper drive mechanism is mounted on the carriage. The paper drive mechanism includes a pair of paper feeder rolls which are rotatably mounted on the carriage. A take-up roll is rotatably mounted on the carriage adjacent to the paper drive rolls. The paper drive rolls and take-up roll are connected by a belt. The drive rollers carry a drive belt which is connected to the driving mechanism.
The printing mechanism is mounted at the end of the carriage for movement transverse to the direction of the take-up roll. The printing mechanism includes a ribbon which is connected to the printing mechanism. The ribbon is moved in the transverse movement across the printing mechanism so that dots can be printed on the paper by the printing mechanism. The printing mechanism includes a plurality of needles which are movable in the transverse movement toward and away from a printing surface of the paper. The force of the print mechanism urges the paper against the paper drive rolls as the carriage is moved in the direction of the take-up roll.
The take-up roll is connected to the power take-off shaft of the printing mechanism. The take-up roll is typically attached to a nut which is threaded onto the power take-off shaft of the printing mechanism. Thus, the take-up roll will rotate as the printing mechanism rotates.
The speed of the carriage may be varied. When the carriage is slowed down, the spacing between the printing mechanism and paper is not changed. In addition, the rate of movement of the printing mechanism across the paper is not affected. By 0b46394aab