JPH0731393B2 - Light and pressure sensitive recording paper cutting mechanism - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive pressure-sensitive recording paper cutting mechanism suitable for an image forming apparatus using a photo-curable photosensitive pressure-sensitive recording paper.

[Prior art]

In an image forming apparatus using roll-shaped recording paper, such as a copying machine, it is necessary to cut the paper into a predetermined size and discharge the paper. In addition to the default sizes such as A size and B size, related techniques required for cutting into arbitrary sizes, especially stains when cutting the roll paper, become a problem.

[Problems to be solved by the invention]

An image forming apparatus using roll-shaped photosensitive pressure-sensitive recording paper,
For example, in a copying machine, if the roll paper is cut before development, the microcapsules on the photosensitive pressure-sensitive recording paper are destroyed by the opportunity stress applied by the blade of the cutting machine or the roll paper holding mechanism. . Therefore, unsightly coloring occurs around the cutting portion, which is inconvenient in use. The present invention is intended to eliminate the inconvenience in an image forming apparatus using such a roll-shaped photosensitive pressure-sensitive recording paper, but can naturally be applied to the cutting of other recording papers.

[Means for solving problems]

A problem with the present invention is that the cutting mechanism of the light and pressure sensitive recording paper having the structure described in the claims and the cutting position of the photocurable light and pressure sensitive recording paper are provided before or after the exposure unit for image formation. The problem is solved by the cutting mechanism of the light and pressure sensitive recording paper, which comprises the exposing means for performing the exposure with the predetermined width, and the cutting means arranged before the pressure developing means.

[Effect of the present invention]

With undeveloped light-sensitive pressure-sensitive recording paper, the photo-curable microcapsules cure once exposed to sufficient light, so even if mechanical stress is applied thereafter, the microcapsules will not be destroyed and undesired color development will occur. Absent. With the cutting mechanism according to the present invention, this principle avoids undesired color development at the cutting portion where mechanical stress is applied.

[Explanation of Examples]

1a and 1b are a cross-sectional view and a plan view of a cutting mechanism that schematically shows the principle of the present invention. The photosensitive pressure-sensitive recording paper 2 coated with the photocurable microcapsules 1 is cut by the cutting blades 3 and 3 ', but the linear light source 5 is used only at a predetermined portion 4 of the cutting portion before cutting. And add exposure. In this example, light shielding is performed by the light shielding plate 6, and exposure of the predetermined portion 4 is regulated by the slit 7 of the light shielding plate 6.

FIG. 2 shows a case where linear exposure is performed using a condenser lens. As the light source 5, a linear light source is used as in FIGS. 1a and 1b, and the condenser lens 8 is also cylindrical. The exposure width 4 is a slit 7'provided in the diffuse reflection preventing light-shielding plate 6 '.
And 7 "on the recording paper.
In the case of this figure, the exposure position and the cutting position are separated, and assuming the case of roll paper, the feed rollers 9 and 9'are provided. Prevents easy wrinkling and bending of recording paper.

In any of the cases shown in FIGS. 1a, 1b, and 2, in order to continuously cut roll-shaped photosensitive pressure-sensitive recording paper into a predetermined size, a cutting position determining means and a cutting mechanism driving means are provided. , A mutual time-series relationship with the exposure means is required. In this case, a control circuit such as a simple sequencer is also required. The third example of the simplest copying machine including these
Shown in the figure.

In the copying machine of FIG. 3, the recording paper is cut before copying, and the roll-shaped recording paper 10 is pulled out by the paper feed rollers 12 and 13.
The exposure is added by 11. This exposure method is shown in Figure 1a,
Although the method of FIG. 1b or FIG. 2 is used, a rotary blade is used as the cutting mechanism.

The recording paper is cut by a cutting rotary blade 15 mounted on the surface of the cutting roller 14 and an auxiliary roller 16. In this case, the length of the sheet to be cut needs to be set to a constant time series operation with reference to a motor for driving the feed roller 12, for example, a stepping motor. The number of pulses of the stepping motor is 10,000 for sending the recording paper to a predetermined size.
Assuming that the number of light sources is 11, the light source of the exposure unit 11 needs to emit light for every 10,000 pulses for a certain period. Correspondence between the exposure position and the position of the cutting blade 15 is achieved by optimally selecting the gear ratio between the cutting roller 14 and the feed roller 12 and the position of the cutting exposure unit 11 in the case of FIG. It is possible.

The cut recording paper goes through a process similar to that of an ordinary copying machine as shown in FIG. That is, the recording paper is sent to the exposure position for image formation by the conveyor 25, positioned by the stopper 24, irradiated by the irradiation light source 22 to the original 19 placed on the original table 20, and the reflected light is condensed by the lens 21 and is exposed. Exposure to pressure sensitive recording paper. After that, it is developed by the pressure roller 18 and sent out by the feed conveyor 25. Incidentally, when the cutting is adopted in a system in which it is carried out after the image formation or is used as a single cutting position, a corresponding mechanism is required, but the above-mentioned constitution can be applied to the cutting section.

[Brief description of drawings]

1a and 1b are a schematic sectional view and a plan view for explaining the principle of the cutting mechanism according to the present invention. FIG. 2 is a schematic sectional view showing another method showing the principle of the present invention. FIG. 3 shows an embodiment in which the cutting mechanism according to the present invention is applied to a copying machine using a roll-shaped photosensitive pressure-sensitive recording paper. Correspondence between the main reference symbols in the figure is as follows. 1: Photocurable microcapsule 2: Photosensitive pressure sensitive recording paper 3, 3 ': Cutting blade 5: Linear light source 7,7', 7 ": Slit 8: Cylindrical lens 11: Cutting exposure unit 12: Feed roller 14: Cutting roller 15: Cutting blade

Claims (1)

[Claims] 1. An exposure unit arranged before or after an exposure unit for image formation for exposing a cutting position of a photocurable photosensitive pressure-sensitive recording paper with a predetermined width, and a pressure developing unit. A cutting mechanism for light and pressure sensitive recording paper, comprising: a cutting means provided.