JPS61199971A - Controller for feeding of recording paper - Google Patents

Abstract

PURPOSE:To avoid the effects of recording speeds of a printer on the recording speeds of a thermal head by a method in which a resist roll is provided behind the thermal head, and the resist roll is stopped for a given time period, a loop of recording paper is made. CONSTITUTION:Behind a carrying roll 8, a resist roll 9 to feed a recording paper 5 transfer-printed by a thermal head at a higher speed than the transferring speed of a copying machine 11 and a sensor 10 are provided. When the tip of the paper 5 fed by the machine 11 reaches the roll 9, it is detected by the sensor 10 to stop the rotation of the roll 9. A loop lA corresponding to the stopping time tA is formed between the roll 8 and the roll 9. On the other hand, a loop lB corresponding to transfer recording time period is formed between feeding rolls 12 and 7. Even when the paper 5 is fed at high speeds at one time by the roll 9 after ending transfer recording, the paper 5 can be fed while reducing the length of the loop lB.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording paper conveyance control device that allows a copying machine to be connected to a marking device such as a standby whose recording speed is slower than the copying speed.

[Conventional technology]

Among the stampers used in conventional copying machines, there is one shown in FIG. 2, for example, as a transfer type thermal recording device.

This transfer type thermal recording device consists of an ink donor film (hereinafter abbreviated as IDF) 1 coated with heat-fusible or heat-sublimable ink, a supply roll 2 around which IDFI is wound, and [DFI] after use. A take-up roll 3 that winds up the IDPI, a thermal head 4 that converts an electrical signal into a thermal signal and heats the IDPI, a recording paper 5 that records by thermal melting or thermal sublimation of the IDFI ink, and a recording paper 5 that transfers the recording paper 5. Sometimes I'D
It is composed of a back roll 6 that is brought into pressure contact with the thermal head 4 via F1, a transport roll 7 that transports the recording paper 5 to the transfer section, and a delivery roll 8 that transports the recording paper 5 after transfer.

In the above configuration, the recording paper 5 conveyed from the conveyance roll 7 is pressed against the IDFI by the back roll 6, and the thermal head 4 generates heat in response to image information. The layers are transferred onto recording paper 5. The IDPI is sent out from the supply roll 2, and after use is taken up by the take-up roll 3, and the back roller rotates in the direction of the arrow in the figure to move the IDFI and the recording paper 5 to the right.

[Problem that the invention seeks to solve]

However, according to the conventional transfer type thermal recording device, when connected to a copying machine for post-processing, for example, as a stamper, the recording speed of the thermal head is slower than the copying speed of the copying machine, so the copying speed is lower than that of the copying machine. Even if the collision of the recording paper between the printer and the transfer type thermal recording device is solved by some means, the recording speed of the entire device will be influenced by the recording speed of the thermal head and will be inconveniently slow.

[Means and effects for solving the problems] The present invention has been made in view of the above, and in order to minimize the extent to which the recording speed of the entire device is affected by the recording speed of the thermal head, Later, a registration roll is installed, and by stopping the registration roll for a predetermined period of time and creating a loop of recording paper after the thermal head, the speed of the conveyance system is lowered only during transfer, and as soon as the transfer is completed, the speed is lower than the copying speed of the copying machine. An object of the present invention is to provide a recording paper transport control device that transports the recording paper using registration rolls at a high speed.

〔Example〕

Hereinafter, the transfer type thermal recording apparatus according to the present invention will be explained in detail. Figure 1 shows one embodiment, and the same parts as in Figure 2 are indicated by the same reference numerals, so redundant explanation will be omitted.
After the carry-out roll 8, there is a registration roll 9 that transports the recording paper 5 that has been transferred by the thermal head 4 at a higher speed than the copying speed of copy all, and detects that the leading edge of the recording paper 5 has arrived at the registration roll 9. It has a sensor 10.

In the above configuration, the conveyance speed of the recording paper 5 supplied from the copying machine 11 (this is the copying speed of the copying machine 11, and when the recording paper 5 is not transferred by the thermal head 4, the leading edge of the recording paper 5 is placed on the registration roll. 9) is xIm/sec, the conveyance speed of the thermal head 4 during transfer is ytm/sec, and the conveyance speed after the registration roll 9 is 2 m/sec, then y<x<z The conveyance speed of the recording paper 5 is controlled so that the following relationship is established.

The recording paper 5 conveyed from the copying machine 11 at a speed of xw/sec is directly transferred to the first and second conveyance rolls 7.
12. When the tip reaches the registration roll 9 via the bar roll 6 and the carry-out roll 8, the sensor 10 detects it and a control unit (not shown) moves the registration roll 9.
Turn off the clutch to stop its rotation. Due to the stoppage of the rotation of the registration roll 9, a loop 7 of tA -xmm corresponding to the stop time tA is formed between the carry-out roll 8 and the registration roll 9! A lump is formed. On the other hand, when transfer recording by the thermal head 4 starts, the transport roll 7 and the delivery roll 8 are decelerated to y + n / sec, so that t゜( X
-y) A loop β of 1 m is formed. When the transfer is completed, the clutch of the registration roll 9 is turned on, and even if the recording paper 9 is transported at a speed of z mm/sec, it can be transported while reducing the loop length of the loop β, so that no excessive tension is applied to the transfer recording paper 5. The recording paper 5 can be conveyed without any adverse effects. Further, since the loop β8 is formed before the thermal head 4, collision between the recording paper 5 discharged from the copying machine 11 and the recording paper 5 being transferred by the head 4 can be avoided.

Here, a necessary loop is required so that the recording paper 5 being transferred by the thermal head 4 is not affected by the high-speed conveyance of the registration roll 9! In order to form IA, the following conditions must be satisfied. That is, if the registration roll 9 is stopped for tA seconds after reaching the leading edge of the recording paper 5, a loop of the recording paper 5 of x x tA is created, and t3 seconds after the leading edge of the recording paper 5 reaches the registration roll 9. The loop amount required to start transcription and end it after tc seconds is (z-x)x ta+(z-y)X(tc-tg), so tA-x=(z-x) x tB+(z-y)X(tc-
The value of tA that satisfies t4 is the time required to form a loop.

The hack roll 6, the transport roll 7, and the take-out roll 8 each have a sprocket and are driven by a transport part motor (not shown) via a chain, and the sprocket of the transport roll 7 is connected to the back roll 6 and the transport roll 7 by turning on the clutch. It has the number of teeth to make the transport roll 7 and the transport roll 8 move at a speed of X fin/see, and when the sprocket of the transport roll 8 is clutched on,
It has the number of teeth that allows the delivery roll 8 to move at a speed of y mm/sec. Further, the registration roll 9 has a sprocket that receives the driving force of a registration portion motor (not shown), and is switched between rotating and stopping by turning on and off a clutch.

In the above embodiment, the loop β8 is provided between the copying machine 11 and the thermal head 4, but the loop β8 is not limited to this.
After storing it in a tray etc.; - Maru head 4
Collision between the recording sheets 5 between the two can also be avoided by sequentially feeding them. Furthermore, it goes without saying that an inkjet method or the like can be applied to the marking section in addition to the thermal transfer method.

〔Effect of the invention〕

As explained above, according to the recording paper conveyance control device of the present invention, a registration roll is provided after the thermal head, and by stopping the registration roll for a predetermined period of time to create a loop of recording paper after the thermal head, only at the time of transfer. The speed of the conveyance system is lowered, and as soon as the transfer is completed, the recording paper is conveyed by the registration roll at a speed faster than the copying speed of the copying machine, so the recording speed of the entire device is affected by the recording speed of the thermal head. As little as possible (can be done).

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory diagram showing one embodiment of the present invention. FIG. 2 is an explanatory diagram showing a conventional transfer type thermal recording device. Explanation of symbols

Claims (1)

[Scope of Claim] A recording paper conveyance control device that controls the conveyance of recording paper that is subjected to recording in a marking section after being ejected from a copying machine, comprising: a registration roll disposed after the marking section;
The resist roll is stopped for a time corresponding to the recording speed and recording time of the marking section to form a loop of a predetermined length between the marking section and the resist roll, and when the time has elapsed, the resist roll is stopped. A recording paper conveyance control device comprising: a control section that rotates the registration roll at a higher speed than a copying speed.