JPS6178270A - Paper feeder - Google Patents

Abstract

PURPOSE:To give the deflection to a roll-like recording sheet and to prevent the fluctuation of a load in the midst of recording by paying out the roll-like recording paper of the next one page after the termination of recording and winding back its top to the writing position of a recording head. CONSTITUTION:A recording motor 1 advances further a roll-like recording sheet 5 of one page in the same direction through a platen roller 3, calculating from the termination of recording, and then returns the top of the recording sheet 5 in the reverse direction to the write position of a recording head 4. At this time, the roll-like recording sheet 5 is contained along the shape of a recording sheet case 7 with the deflection. A control circuit 2 calculates a distance, switches the normal and reverse rotations of the recording motor 1 and drives said motor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a paper feeding device that can cope with load fluctuations that occur during transport of recording paper in a facsimile machine or the like.

■Prior Art Conventionally, devices that perform recording while paper is being fed produce uneven recording when a load fluctuation occurs on the feed motor. In a recording apparatus that uses a roll of recording paper and involves a rewinding operation, the recording paper becomes slack and tensioned, resulting in load fluctuations.

When a slack state occurs, there is a method of maintaining the tension state using a recovery spring installed near the rolled recording paper.
This method places a heavy load on the recording motor, which causes uneven paper feeding due to problems in paper feeding responsiveness during intermittent feeding in facsimile recording devices and the like.

■ Purpose The present invention is intended to solve the above-mentioned problems.When one page of recording paper has been recorded using a roll of recording paper, it is cut and then one page of the roll of recording paper is fed out. The purpose of this method is to provide slack to the rolled recording paper by rewinding the recording paper so that the leading edge of the recording paper is at the recording position, thereby preventing load fluctuations during recording.

(2) The configuration diagram shows the configuration of an embodiment of the present invention, in which 1 is a recording motor, 2 is a control circuit, 3 is a platen roller, 4 is a recording head, 5 is a roll of recording paper, 6 is a cutter, and 7 8 is a recording paper case, and 8 is a roll paper shaft.

A platen roller 3 rotated by a recording motor 1 is pressed by a recording head 4 and feeds a roll of recording paper 5. When the recording by the recording head 4 is completed, the rear end of the recording section is fed to the cutter 6 and cut.

The recording motor 1 further advances the rolled recording paper 5 by one page counting from the end of recording in the same direction via the platen roller 3, and then moves the leading edge of the rolled recording paper 5 in the opposite direction to the recording head 4. Return to the writing position. At this time, the rolled recording paper 5 is accommodated along the shape of the recording paper case 7 with some slack. The control circuit 2 calculates the distance, switches the recording motor 1 between forward and reverse rotation, and drives the recording motor 1.

When recording is started again, the platen roller 3 gradually feeds out the rolled recording paper 5, and the rolled paper shaft 8 does not rotate until one page of recording is completed).

That is, during recording, the load force of the roll paper itself 1 the recording motor 1
Since it does not add to the load, a constant light load is always maintained.

■Effects As explained above, the present invention maintains a constant and light load on the motor of the roll of recording paper itself during recording, thereby making the paper feed responsiveness constant and fast. A recorded image without unevenness can be obtained.

[Brief explanation of the drawing]

The figure is a configuration diagram of an embodiment of the present invention. 1... Recording motor, 2... Control circuit, 3...
-Platen roller, 4...recording head, 5...rolled recording paper, 6...cutter, 7...recording paper case, 8...roll paper shaft. =4-

Claims (1)

[Claims] a recording head that records on a roll of recording paper; a cutter that cuts the recording paper after recording; a recording motor that drives a platen roller that conveys the roll of recording paper;
The recording motor conveys the recording paper after recording is completed to a cutter via a platen roller to cut the trailing edge, and after recording is completed, the recording motor conveys the recording paper after recording is completed to a cutter. A paper feeding device characterized by feeding out a roll of recording paper and then rewinding the leading edge of the recording paper to a writing position of the recording head.