JPS606552A - Curl corrector for copying machine supplied with rolled paper - Google Patents

Abstract

PURPOSE:To perform an appropriate curl correction, by reducing the angle of unwinding of paper from a roll depending on the decrease in the diameter of the roll to heighten an unwinding effect. CONSTITUTION:When paper feed rollers 4 are rotating, a solenoid 24 is energized by a control section to swing a lever 21 clockwise to bring a curl correction roller 22 into contact with a roll of paper 1. The paper is delivered out of the roll while being in contact with the peripheral surface of the curl correction roller 22 within an angle theta, so that the paper is curled oppositely to its original curl. As a result, the curl of the paper is corrected. Although the diameter of the roll of the paper 1 is decreasing, the solenoid 24 is kept energized to bring the curl correction roller 22 into contact with the unwound paper in opposition to a spring 26. The curl of the paper is thus corrected depending on the decrease in the diameter of the roll.

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a method for correcting curls caused by curling of roll paper by keeping a curl removing member in contact with the surface of the roll paper only when the paper is green. The present invention relates to a curl correction device for a roll paper feeding type copying machine which imparts curls and improves the curl removal effect as the diameter of the roll paper decreases.

[Prior art]

An example of a conventional roll paper fed copying machine is shown in FIG. This copying machine includes a holder 3 that rotatably fixes a shaft 2 of a roll paper 1 having a predetermined width and length and wound to a required diameter, and a paper that is pulled out from the roll paper 1. A paper feed roller 4 that feeds the paper to a subsequent stage, a four-tally cutter 5 that cuts the paper fed by the paper feed roller 4 at a predetermined timing (timing that matches the required paper size), and a cutting machine. A guide 7 that guides the printed paper 6 to the transfer section
It is equipped with In addition to this configuration, a photosensitive drum 8 on which an electrostatic image is formed according to the projected optical image, a platen 9 on which a document, etc. is placed and scanned (moved) during copying, and a platen 9 that is irradiated. an optical system 11 that projects changes in light reflected from the surface of the document onto the photoreceptor drum 8 as an optical image to form an electrostatic surface image, and a developer that attaches toner to the electrostatic latent image and develops it. 12, a transfer device 13 that transfers the toner image on the photosensitive drum 8 onto the paper 6 fed through the guide 7, a fixing device 14 that fixes the toner attached to the transferred paper 6, Finished photoconductor drum 8
a cleaner 15 that removes toner remaining on the surface of the photoreceptor tram 8; an erase corotro 716 that removes the electric charges on the surface of the photoreceptor tram 8 cleaned by the cleaner 15; It is equipped with a charging roller a 17 that uniformly charges the electric current.

In the above configuration, when the copy start button (not shown) is pressed, the platen 9 is illuminated by the light source 10 from the opposite side of the document placement surface, the photoreceptor drum 8 rotates at a predetermined synchronized timing of the platen, and further, Paper feeding is performed in synchronization with the timing at which the toner image based on the electrostatic image reaches the transfer device 13. The scanning content obtained by the movement of the platen 9 is continuously transferred to the photoreceptor tram 8 by the optical system 11. An electrostatic latent image is formed on the image, toner is further applied by the developing device 12, and this developed surface is moved to a transfer section where a transfer device 13 is located.

On the other hand, the □ paper is sent to the roll paper 1 to the shear flame correcting device, and the corrected paper is cut into a desired paper size by rotating the rotary cutter 5 by the paper feed roller 4. The cut paper 6 is fed between the transfer machine 13 and the photosensitive drum 80 via the guide 7. The photosensitive surface of the photosensitive tram 8 arrives at the transfer section where the transfer device 13 is located in synchronization with the timing at which the paper 6 arrives at the transfer machine 13, and the image is transferred onto the paper 6.

Further, the paper 6 on which the transfer has been completed is sent to the fixing device 13, where fixing is performed, and copying is completed.

By using roll paper in this manner, even if the copy size is different, there is no need to replace and insert trays of the required size, and copying operations become easier.

However, in conventional roll paper feeding copiers, the paper is pulled out from the curly roll paper and fed directly to the rotary cutter using the paper feed roller. The paper curls as shown in FIG. 1, and this curl may cause the image to fall out, paper jam, or the image to rub.

[Object and structure of the invention]

The present invention has been made in view of the above, and is intended to correct curls caused by curling of roll nails and to prevent reverse curls from occurring. The curl removal member, which is placed at a position where the paper receives curls in the opposite direction to the curls caused by curls, is brought into contact with the surface of the roll paper only when the paper is fed out, thereby reducing the diameter of the roll paper. Accordingly, the present invention provides a curl correction device for a roll paper-fed copying machine in which the angle of the roll take-off is made smaller to enhance the roll take-off effect.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The curl correction device for a roll paper fed AM copying machine according to the present invention will be described in detail below.

FIG. 2 shows an embodiment of the present invention, in which the same parts as in FIG. The long side end of the lever 2 has a length that allows it to reach a position where it can curl in the opposite direction to the curl caused by the curl of the roll paper.
1, a curl remover 222 rotatably attached to the long side end of the lever 21, and a curl remover 222 attached to the short side end of the lever 21 via a link 23 to remove the curl when the paper is fed out.
a solenoid 24 for sucking 3; and a stopper 25 for regulating the rotation of the lever 21 so that the curl remover 222 does not separate beyond a predetermined distance from the maximum diameter of the roll paper l;
A spring 26 biases the lever 21 to separate the curl removal roller 22 from the roll 1, and a solenoid 24 is activated only when the copying machine feeds out paper during copying.
It also includes an ili control section 27 that excites the iris.

In the above configuration, when the roll paper 1 is not pulled out, the solenoid 2
is de-energized, the lever 21 is moved counterclockwise by the spring 26, and the stopper 2
It looks like it's locked in 5! ,! Suniashi, curl removal sheet roller 2
2 MP has been pulled from fd roll paper 1. Therefore,
Mr. A (Du, Curl 55 does not accept the correct condition H113, and even if it is left for a long time, it will cause reverse curl fd [<
There is no risk of paper jams, etc.

Next, when the copying machine enters the operating state from the stopped state (step 1), the paper feed roller 4 rotates and at the same time the solenoid 24 is energized by the control unit 27, the lever 21 is rotated clockwise, and the third Curl removal Jiro 222f as shown in the picture
, roll, and the surface of the grinding wheel 1. The paper is fed out from the roll paper 1 while curling due to the peeling, and the paper is curled in the opposite direction to the curl of the roll paper 1, thereby correcting the curl.

Even if the paper from the roll paper 1 becomes greener and the diameter of the roll paper 1 becomes smaller as shown in FIG. 4, if the solenoid 24 is energized, the curl removal roller 22 will move against the spring 26 to remove the curl from the roll paper 1. is brought into contact with. At this time, the winding angle becomes θ', the amount of winding of the roll paper 1 around the curl removal roller 22 increases, and curl correction is performed in proportion to the decrease in diameter.

In addition, in the above embodiment, the roller 2 is used as the curl removing member.
2 is used, but a plate material (not rotating) having a predetermined curved surface may also be used (in this case, it is desirable to apply Teflon processing or the like to the surface).

Further, although an example has been shown in which the roller is moved by a lever and brought into contact with the roll paper, conversely, the roller may be fixed and the roll paper itself may be moved using the drive mechanism shown in FIG. 2.

〔Effect of the invention〕

As explained above, according to the curl straightening device for a roll paper feeding type copying machine of the present invention, the curl removing member is used to curl the paper pulled out from the roll paper in the opposite direction to the curl caused by curling. By making contact with the roll paper only during feeding, and by reducing the angle of the roll paper in accordance with the decrease in the diameter of the μm paper to improve the effect of the roll paper, it is possible to achieve an appropriate curl according to the amount of paper fed out. Since the curl correction can be performed and the curl correction can be stopped when the curl is not fed out, it is possible to prevent the occurrence of reverse curl.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a conventional roll paper feeder copier;
The figure is a configuration diagram showing one embodiment of the present invention, Figure 3 is an explanatory diagram showing the state when the roll paper diameter of the embodiment of Figure 2 is large, and Figure 4 is the roll paper of the embodiment of Figure 2. It is an explanatory view showing a state when a diameter is small. DESCRIPTION OF SYMBOLS 1... Roll paper, 3... Holder, 4... Paper feed roller, 5... Rotary cutter, 8... Photosensitive drum, 13... Transfer device, 21... Lever, 22・
・・Curl removal roller, 24・・Solenoid, 25・
...Sto, Bar, 26...Sfring, 27...
control section. Patent Applicant: Fuji Xerox Co., Ltd. Agent Shin Matsubara 2, Seishunma Muramoto 1) Yudo Tadashi, Atsushi Kamijima - Hitoshi Suzuki, Figure 2, Figure 3, Figure 4d

Claims (1)

[Scope of Claims] In a roll paper feeding type copying machine that cuts paper fed out from a roll paper into a predetermined length using a cutter and feeds the cut paper to a transfer section, the apparatus is provided at a position where the roll paper is pulled out. a curl removing member that imparts curls in the opposite direction to the curls caused by curling of the rolled paper to the rolled paper; and a curl removing member that contacts the surface of the rolled paper only when the paper is fed out. 1. A curl straightening device for a roll paper feeding type copying machine, characterized in that a drive mechanism 1°q is provided for increasing the curl removal effect as the diameter of the roll paper decreases.