SU1647643A1 - Device for checking alphanumeric printer medium transport - Google Patents

Abstract

The invention relates to alphanumeric printers intended for line-printing on perforated paper of results of solving information-logic and computational problems. The purpose of the invention is to improve the accuracy of control. Using the unevenness of the paper surface, the device generates a signal that the alpha-numeric printing device doesn’t print when there is no movement of paper at the next interval (jam), which eliminates the possibility of overlapping one print line on another. The device improves the reliability of issuing the results of calculations in the form of a document on an alphanumeric printing device. 2 yl

Description

The invention relates to alphanumeric printers intended for line-printing on perforated paper of results of solving information-logic and computational problems.

The aim of the invention is to improve the accuracy of control due to the movement of perforated paper tape.

1 shows a diagram of the device; figure 2 - timing diagram of the device.

The device contains (figure 1) mechanical sensor 1 break (checkbox) in contact with a paper tape alphanumeric printing device (ADC) and installed between the illumination lamp 3 and the photodiode sensor 4 (diodes D1. D2). connected through a current amplifier 5 (made, for example, in the form of an emitter current) to the winding of the relay 6 open circuit, normally open contacts 7, 8 of which are connected to the open indication lamp 9, and normally closed 10, 11 to the winding of the ready relay 12, contacts which are connected to the readiness and unwillingness signal buses connected to the processing unit (not shown), as well as the bus. Interval processing from the sensor connected to the input shaft 13 of the ADC. In addition, a piezoelectric sensor interfaced to the surface of the paper tape 2, an additional current amplifier 15 (made, for example, in the form of an emitter follower and voltage amplifier), a rectifier 16 (diodes and low pass filter), a threshold element are introduced into the device. 17 (e.g., Schmitt trigger), valve 18, and additional bus. Print unavailability associated with the processing unit. Pulse input

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valve 18 is connected to the bus. Interval processing.

The device generates two signals Print unmatched. The elements of the device with positions 1–12 form the Unreadiness signal when the paper is broken, and the elements with positions 13–18 form the Signal unwillingness when there is no paper movement at the next interval in accordance with the angle of rotation of the feed shaft 13.

If there is paper above sensor 1, its flag blocks the light flux from lamp 3 to sensor 4. Signals from sensor 1 of relay 6 of the paper break are not received, lamp 9 of the paper break alarm does not light up, since pins 7, 8 are open. Relay 6 contacts 10, 11 closes the power supply circuit of the ready relay 12, the voltage from the power source enters the computer as a potential ready signal,. The CPU generates information printing. If during the operation of the ADC, the paper is broken, the mechanical sensor 1 rotates around the axis and its flag opens the way for the light flux from the lamp 3 to the photodiode sensor 4, under the action of which the relay is activated; 6, normally open contacts 7,8 closes the power supply circuit of the alarm signal lamp 9 Paper break. Relay 12 de-energizes and with its normally open contacts it breaks the Ready-to-Signal circuit, and normally closed contacts closes the Signal circuit. At this signal, the computer stops the printing of information.

The paper motion signal from the output 16 is fed to the input of the threshold element 17 (Schmitt trigger), which forms a zero inhibitory potential (Figure 2, plot 24) when there is a certain level of the paper motion signal at the input. From the output of the element 17, a paper movement signal is fed to the potential input of the valve 18. A signal is received at the pulse input of the last.

Since the potential input of the valve 18 has a inhibitory potential, the output of the valve 18 is a signal that print unavailability will be absent and the ADC will print the next line (figure 2, plot 26).

In the event of a paper jam, the shaft 13, when rotated, does not cause the paper to move. The piezoelectric sensor 14 does not read out any irregularities and, therefore, there will be no Paper Motion signal at its output, which leads to the absence of a control signal at the input of the threshold element 17, the output of which in this case will be a negative potential (Figure 2, plot 24), which permits the passage of a pulse. The interval is tested through the valve 18 as a pulse. The print unavailability (figure 2, plot 26). The signal from the output of the valve 18 is supplied to a computer, where it is perceived as a signal of unavailability of the ADC. A computer on this signal stops the delivery of information on the black line to

printing and informs the operator about the unavailability of the ADC. Overlay information of different lines does not occur. After eliminating the causes of jammed paper, printing can continue.

Claims (1)

Apparatus of the Invention A device for monitoring the movement of a print medium of an alphanumeric printing device, comprising a mechanical break sensor, in contact with a paper tape of an alphanumeric printing device, and mounted between a backlight and a photo sensor mounted through a current amplifier the breaker winding, the normally open contacts of which are connected to the break indication lamp, and the normally closed contacts of the readiness winding, the contacts of which are connected to the signal buses Willingness and unwillingness, connected to the processing unit, as well as the tire working out the interval of the sender associated with the feed shaft of the printing device, characterized in that increase the accuracy of control by taking into account the movement of perforated paper tape; a piezoelectric sensor connected in series with it is inserted into it, tape, additional current amplifier, rectifier, threshold element, valve and additional bus. Target unavailability associated with the processing unit, with the pulse input of the valve connected to the bus. Interval processing. / Wtfj sZi „oyudzTsnp- 2l, 9W fft ° ft ouwogooiuo nuohsv I shzoidoshoshzn wg CWZ.t-9L ffofi "WA9 are AMONATHYNORMALS RUNNING / / GECHAP EUMNG G STRINGS 20 and Ґ}  g / |  22. 1 Ifll ; gu. g / and (isV V V fig.g t J V V impulse and him