JPH06206306A - Image transfer device with tray - Google Patents

Abstract

PURPOSE:To make the attachment of an image formation material to an impression cylinder, etc., easy and safe, by supporting a tray between and above the impression cylinder and the transfer cylinder so as to swing freely around its supporting point, and by forming the tray from a metallic support plate, a heat insulating member provided partially on the support plate, and a synthetic resin placing-plate. CONSTITUTION:A tray 11 is obtained by partially mounting a heat insulating member 21 on a metallic support plate 20, and then mounting a synthetic resin placing-plate 22 thereon. A supporting point 12 is provided near the center of the tray 11 and is positioned between and above an impression cylinder 1 and a transfer cylinder 7. The tray 11 freely swings so as to come into close contact with the surfaces of the impression cylinder 1 and the transfer cylinder 7. Armor covers 13 and 14 are set above the transfer cylinder 7 and the impression cylinder 1, respectively. The armor cover 13 on the side of the tray 11 slants so as to form a slanting line with the tray 11 inclined towards the impression cylinder 1 at the front end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image transfer device having excellent workability. More specifically, the present invention relates to an image transfer apparatus provided with a tray having an excellent heat insulating property, which is tiltable on the impression cylinder side or the transfer cylinder side on which an image receptor or image forming material is placed.

[0002]

2. Description of the Related Art Recently, an image forming material in which a photosensitive layer is coated on one surface of a support is imagewise exposed, and then the image formed on the photosensitive layer is heated, generally at about 80 to 150 ° C. Thus, a single-color or multi-color prepress proof suitable for proof printing to be transferred to an image receptor such as paper has come to be produced. The image forming material comprises a support, a photosensitive layer formed on one surface of the support, and a protective film. The support and the protective film are cellulose acetate,
Thin films or sheets made of materials such as polystyrene, polyvinyl chloride, polyethylene terephthalate are used. As the image receptor, an appropriately selected printing material such as paper or film is adopted.

As an apparatus for producing the above-mentioned prepress proof, an impression cylinder having an image forming material attached thereto and a transfer cylinder having an image receiving member attached thereto are arranged such that the photosensitive layer of the image forming material and the image receiving member face each other. An apparatus has been generally proposed in which both cylinders are contact-pressed with each other to transfer the image formed on the photosensitive layer to an image receptor at a nip between the cylinders. To produce multicolored prints or prepress proofs, color originals are color separated to form imagewise exposed image-forming materials of respective colors, for example yellow, magenta, cyan and black, which are then formed in sequence. The image formed on the photosensitive layer of the material will be transferred to the image receptor.

Therefore, when a multicolor prepress proof or the like is produced, several image forming materials are used for the same image receptor. Therefore, in order to facilitate the attachment / detachment operation of the image receptor and the image forming material,
The applicant of the present application has proposed an image transfer device in which an image receptor or a tray for mounting an image forming material is provided on the impression cylinder side or the transfer cylinder side (see Japanese Patent Application No. 3-206517).
As a result of further study after that, since the surface temperature of the transfer drum to which the image receptor is attached is heated to 80 to 150 ° C., the mounting tray is also heated due to the residual heat, and for safety, work is performed. It has been found to be a serious obstacle to the above.

[0005]

It is easy to attach an image receptor or an image-forming material to an impression cylinder or a transfer cylinder,
Further, there has been a strong demand for development of a device having no problem in safety, but a device satisfying such a demand has not yet been developed.

[0006]

SUMMARY OF THE INVENTION The present invention comprises an impression cylinder having an image forming material attached thereto and a transfer cylinder having an image receptor attached thereto, and the image forming material and the image receiving body are rotated by rotating the impression cylinder and the transfer cylinder. In the nip between the impression cylinder and the transfer cylinder to transfer the image formed on the photosensitive layer of the forming material to the image receptor, the apparatus comprising an intermediate position above the impression cylinder and the transfer cylinder. In addition, a metal support plate having a tray whose tip can approach the impression cylinder side or the transfer cylinder side around the fulcrum, the tray having a fulcrum, and a heat insulating member partially provided on the support plate are provided. An image transfer device comprising an image forming material or a synthetic resin mounting plate of an image receptor.

Further, the present invention is the image transfer device, wherein the transfer device comprises an outer cover, and the outer cover is separated into an impression cylinder side outer cover and a transfer cylinder side outer cover at an upper portion of the transfer device. Provided is an image transfer device, wherein the tray side inclination angle of the transfer cylinder side outer cover is set to be substantially the same as the tray inclination angle when the image forming material is mounted.

The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic sectional view of the image transfer device of the present invention when the tray is inclined toward the impression cylinder.

The impression cylinder 1 is provided with an image forming material attachment means. As this attachment means, various means such as a clamp, an adhesive tape, a pin bar, etc. can be adopted. In FIG. 1, the sheet receiving base 3 is installed in the cutout portion 2 of the impression cylinder 1,
An example is shown in which the sheet pedestal 3 and the magnet sheet 4 hold the upper side of the image forming material and the lower side of the image forming material is held by the adhesive tape 5. The transfer cylinder 7 is provided with an image receptor attachment means. In the example of FIG. 1, a clamp 9 is installed in the cutout portion 8 of the transfer cylinder, and the clamp holds the image receptor. The impression cylinder 1 is provided with another notch 10 so that the surface of the transfer cylinder or the impression cylinder is not damaged by the image forming material attachment means or the image receptor attachment means when the impression cylinder and the transfer cylinder rotate in contact with each other. It is preferable that

The tray 11 is installed so as to be rotatable around a fulcrum 12 provided near the center of the tray.
The tip of the tray is near the surface of the impression cylinder 1 or the transfer cylinder 7
Reach near the surface of. The tray 11 may be rotated by any means such as electric or manual. Impression cylinder 1
The exterior covers 13 and 14 are installed on the upper part of the transfer cylinder 7. The tray side of the exterior cover 13 installed on the transfer cylinder side is tilted so that when the tip end portion of the tray 11 is tilted until it reaches the vicinity of the surface of the impression cylinder, the tray cover is tilted substantially the same as the tray. Rolling means such as rollers 16 are provided on both sides of both ends of the tray, and the impression cylinder 1 or the transfer cylinder 7 is provided.
It is preferable that the tip of the tray does not damage the surface of the impression cylinder or the transfer cylinder, or the surface of the image-forming material or the image receptor when the roller rotates. Further, the tray may be foldable on the transfer cylinder side with respect to the fulcrum 12 by a pin joint or the like. This is for facilitating the work of removing the image receptor from the transfer cylinder.

An exterior cover 13 provided above the transfer cylinder 7.
It is desirable that the tray side of 3 has a three-layer structure (not shown) in which a heat insulating layer is provided in the central layer. When an image provided by imagewise exposure on the photosensitive layer of the image-forming material is transferred to the image receptor, generally, the transfer cylinder 7 is heated so that the image transfer to the image receptor is smoothed. . At this time, the tray side of the exterior cover 13 is heated by radiant heat. Since the image forming material uses a thin film as a support, curling or the like is likely to occur when the temperature is high. Further, it is not preferable that the temperature of the outer cover 13 rises in terms of safety during work. The heat insulating layer is made of a heat insulating material such as glass wool and air.

An ironing roller 15 is provided at a position distant from the surface of the impression cylinder 1, and the ironing roller 15 is installed so as to move and contact the surface of the impression cylinder near the tip of the tray 11 when the image forming material is mounted. . It is preferable to install a safety cover 17 on the ironing roller 15.

It is preferable that a part 18 of the outer cover 14 on the impression cylinder 1 side on the tray 11 side is movable by means of a pin joint 19 or the like. The part 18 of the outer cover 14 is
When the ironing roller 15 moves to the vicinity of the tip of the tray 11, it is pushed up by the roller, and when the roller returns to its original position, it falls by its own weight and is positioned in the vertical direction.

FIG. 2 is an explanatory view showing the structure of the tray of the present invention. A mounting plate 22 made of synthetic resin is installed on the tray 11 via a heat insulating member 21 partially installed on the metal supporting plate 20. The support plate is made of metal in order to maintain sufficient rigidity as a tray. The mounting plate is made of synthetic resin so that the sensible temperature can be felt lower even at the same temperature.

The operation of the image transfer device with a tray according to the present invention will be described below. The impression cylinder 1 is rotated to position the sheet receiving table 3 which is the upper side attachment means of the image forming material on the upper side. Then, the tray 11 is tilted toward the impression cylinder side, and an image forming material (not shown) is placed on the tray and the exterior cover 13. The upper side of the placed image forming material is placed at a predetermined position of the sheet receiving table 3 and held by the magnet sheet 4. The magnet sheet 4 preferably has a width that covers both the sheet cradle and the surface of the impression cylinder near the tip of the tray 11. This is to prevent wrinkles and the like due to the cutout portions 3 and the like of the image forming material. Since the image forming material is formed of a soft material and the registration accuracy is adjusted, the tray 11 and the outer cover 1
Placing the image forming material on the sheet 3 is very excellent in terms of convenience of operation.

After holding the image forming material, the ironing roller 15 is moved to contact the magnet sheet 4 on the surface of the impression cylinder, and an appropriately selected pressure is applied. Then, the pressure roller 1 is rotated in the direction of the arrow while the image forming material is brought into close contact with the surface of the impression cylinder by the ironing roller 15, and the lower side of the image forming material is placed on the surface of the impression cylinder near the other notch 10. Fix with 5. After fixing the lower side of the image forming material, the ironing roller 15 is returned to its original position. The ironing roller 15 can be moved by any means such as electric or manual. When the ironing roller 15 returns, the part 18 of the outer cover 14 also returns to the vertical position.

After the image forming material is attached to the impression cylinder, the tray 11 is tilted toward the transfer cylinder 7 side, and the tip of the tray is positioned near the surface of the transfer cylinder. The image receptor placed on the tray 11, for example, the upper side of the paper is gripped by the clamp 9 installed in the cutout portion 8 of the transfer cylinder 7. Then, the transfer cylinder 7 is rotated in the arrow direction while the paper is brought into close contact with the surface of the transfer cylinder, and the lower side of the paper is gripped by another clamp 9.

The image forming material is laminated in the order of a support, a photosensitive layer and a protective film, and the image forming material from which the protective film is peeled off or the image forming material with the protective film is attached to the impression cylinder. Good. In the case of the image forming material with a protective film, it is necessary to once attach the image forming material to the impression cylinder and then peel off the protective film. By pressing the image forming material from which the protective film has been peeled off onto the paper at the nip between the impression cylinder and the transfer cylinder, the image formed by image exposure on the photosensitive layer is transferred to the paper. For multicolor prepress proof, etc.,
In order to transfer the image formed on the image forming material of each color onto one sheet of paper, the above-described operation of attaching the image forming material to the impression cylinder is repeated for each color.

[0019]

According to the present invention, by providing the image transfer device with the rotary tray, the image forming material and the image receptor can be attached by an easy operation without causing wrinkles or misregistration. A device is provided. Further, according to the present invention, there is provided an image transfer device in which a rotating object such as an impression cylinder and a transfer cylinder is covered with an exterior cover and a tray to prevent a disaster from occurring due to an operation error or the like.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an image transfer device of the present invention.

[Explanation of symbols] 1 impression cylinder 7 transfer cylinder 11 tray 13 transfer cylinder side exterior cover 14 impression cylinder side exterior cover 15 ironing roller 16 roller 17 safety cover 18 exterior cover movable part

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[Procedure amendment]

[Submission date] July 15, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an image transfer device of the present invention.

FIG. 2 is an explanatory view showing the structure of the tray of the present invention. 1 Impression cylinder 7 Transfer cylinder 11 Tray 13 Transfer cylinder side exterior cover 14 Impression cylinder side exterior cover 15 Ironing roller 16 Roller 17 Safety cover 18 Moving part of exterior cover

Claims (2)

[Claims] 1. An impression cylinder having an image forming material attached thereto and a transfer cylinder having an image receptor attached thereto, wherein the image forming material and the image receiving body are rotated by the rotation of the impression cylinder and the image receiving body. An apparatus for transferring an image formed on a photosensitive layer of the forming material to an image receptor by being introduced into a nip between the image forming apparatus and the apparatus, wherein the apparatus is located above an intermediate position between the impression cylinder and the transfer cylinder and has a tip portion centered on a fulcrum Has a tray accessible to the impression cylinder side or the transfer cylinder side, the tray is provided with a metal supporting plate having a fulcrum, and an image forming material or an image receiving member via a heat insulating member partially provided on the supporting plate. An image transfer device with a tray, which comprises a mounting plate made of a synthetic resin for the body. 2. The image transfer apparatus according to claim 1,
The transfer device includes an outer cover, and the outer cover is separated into an impression cylinder side outer cover and a transfer drum side outer cover at an upper portion of the transfer device, and an inclination angle of the transfer drum side outer cover on the tray side forms an image. An image transfer device with a tray, characterized in that the inclination angle of the tray when the material is loaded is set to be substantially the same.