WO2010069265A1

WO2010069265A1 - Dual-sides enlarging method and device

Info

Publication number: WO2010069265A1
Application number: PCT/CN2009/075691
Authority: WO
Inventors: 侯锋
Original assignee: Hou Feng
Priority date: 2008-12-19
Filing date: 2009-12-18
Publication date: 2010-06-24
Also published as: CN101750863A; CN101750863B

Abstract

A dual-sides enlarging method includes following steps: firstly, a photograph paper is entered into an exposing table (120) with its first surface facing an exposing unit (130) to be exposed for the first time; then, the photograph paper is transferred to an overturn mechanism (150) from the exposing table (120); when a front edge of the photograph paper arrived at the overturn mechanism (150) is detected, the overturn mechanism (150) is overturned to make the second surface of the photograph paper facing the exposing unit (130); after that, the photograph paper is transferred to the exposing table (120) from the overturn mechanism (150) to be exposed for the second time. A dual-sides enlarging device comprises a photograph paper input mechanism (110), an exposing table (120), an exposing unit (130), a photograph paper transfer mechanism (140), and an overturn mechanism (150) including a pair of overturn nipping rollers (151), a detector (152), and an overturn mechanism driver (153).

Description

Double-sided printing method and device

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a printer for copying photographs, and more particularly to a double-exposure printing method and a printing apparatus therefor. Background technique

Photographic papers used for traditional photo printing are single-sided photographic papers that can only be exposed on one side. The photo paper is exposed to one side and placed in a picture frame or a book to be viewed on one side, which affects the use of photographic paper. Recently, a photographic paper which can be double-sidedly sensitized has been proposed. For example, the invention patent of the Chinese Patent Publication No. CN2807300 can form an image on both the front and back sides of the photographic paper, thereby greatly improving the use efficiency of the photographic paper and reducing the cost.

Double-sided photosensitive photographic paper requires double-sided exposure, so the conventional printing device suitable for single-sided photographic paper is no longer suitable. Chinese patent CN2807300 also proposes a double-sided exposure laser printer equipped with two laser exposers symmetrically mounted. When the double-sided photographic paper passes between two laser exposers, each laser exposer is respectively Exposure is performed on both sides of the paper. However, the setup of the two laser exposures undoubtedly increases the cost of the equipment. In addition, the re-equipping of the printer for double-sided printing will make the original single-sided printing equipment unusable, resulting in great waste. Summary of the invention

SUMMARY OF THE INVENTION The present invention provides a double-sided printing method and apparatus that requires only one exposure device and that makes full use of the original single-sided printing apparatus.

One aspect of the present invention provides a two-sided printing method comprising the following steps. First, the photographic paper is brought into an exposure stage and the first surface is exposed to the exposer for the first exposure; then, the photographic paper is transferred from the exposure station to a turning mechanism; when the photographic paper is detected When the front end reaches the turning mechanism, the turning mechanism is turned over so that the second surface of the photographic paper faces the exposer; then, the photographic paper is transferred from the turning mechanism to the exposure Taiwan, for the second exposure.

In an embodiment of the invention, the flipping mechanism is flipped 180 degrees in a clockwise or counterclockwise direction such that the second surface of the photographic paper faces the exposer.

In an embodiment of the invention, after the second exposure, the method further comprises: exposing the photographic paper The light table is sent out through the turning mechanism.

In an embodiment of the invention, the step of transferring the photographic paper from the exposure station to a flipping mechanism comprises: bulging the photographic paper between the exposure station and the turning mechanism.

In another aspect, the invention provides a double-sided printing apparatus comprising a paper input mechanism, an exposure station, a paper conveying mechanism, an exposure device, and a turning mechanism. The photo paper input mechanism is used to input photo paper for exposure. The exposure stage is disposed after the photographic paper input mechanism for accommodating the photographic paper for exposure. The paper transport mechanism has a conveyor belt that passes around the exposure station for transporting the paper into and out of the exposure station. The exposer projects a beam of light to expose the first surface of the photographic paper on the exposure stage. The flipping mechanism includes a pair of flip pinch rolls, a detector, and a flip drive mechanism. A pair of flip pinch rolls are disposed behind the exposure stage for pinching the paper into or away from the exposure stage. The detector is used to detect whether the front end of the photographic paper reaches the flip pinch roller. The turning drive mechanism is connected to the flip pinch roller for driving the pair of flip pinch rolls to rotate after the detector detects that the front end of the paper reaches the flip pinch roll, so that the pair of flip paper pinch rolls the photo paper The second surface faces the exposer.

In an embodiment of the invention, the driving mechanism includes a driving motor, a first gear and a second gear, the first gear is disposed on an output shaft of the driving motor, and the second gear is configured by the first Gear drive, wherein the pair of pinch rollers are disposed on a sleeve driven by the second gear.

In an embodiment of the invention, the inverted pinch roller has a separate pinch drive mechanism. In an embodiment of the invention, the paper conveying mechanism further includes: a second pinch roller disposed on a side of the exposure table adjacent to the paper input mechanism, configured to input the paper input mechanism The conveyed photographic paper is introduced into the exposure stage; and a third pinch roller disposed on a side of the exposure table adjacent to the turning mechanism for introducing the photographic paper from the exposure station into the flipping Pinch roller.

In an embodiment of the invention, the double-sided printing apparatus further includes a transmission mechanism for transmitting power of the third pinch roller to the reverse pinch roller.

In an embodiment of the invention, the double-sided printing apparatus further includes an adsorption mechanism disposed under the exposure stage to cause the paper to be in close contact with the conveyor.

In the above double-sided printing apparatus, an adsorption mechanism is further provided, which is disposed under the exposure stage to bring the paper to the conveyor belt. Wherein, the adsorption mechanism is a centrifugal fan.

The present invention has the following significant advantages as compared with the prior art by adopting the above technical solutions:

1. The double-sided printing device of the present invention requires only one exposure device, and double-sided printing can be realized by appropriately setting the turning mechanism; 2. The double-sided printing device of the invention can be additionally provided with a turning mechanism on the original single-sided printing device, so that the original single-sided printing device can be fully utilized without reconfiguring the device;

3. The turning process of the present invention only needs to be reversed after the front end of the photographic paper arrives, so the turning process is simple and quick. BRIEF abstract

Features and capabilities of the present invention are further described by the following examples and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a double-sided printing apparatus according to an embodiment of the present invention.

2A and 2B are perspective views of inverting mechanisms of different angles according to an embodiment of the present invention. Figures 3A-3H show the flipping process in the A direction of Figure 2A.

4A-4H are the flipping process viewed in the B direction of Fig. 2A.

Fig. 5 is a view showing the structure of a double-sided printing apparatus according to another embodiment of the present invention.

6A and 6B are perspective views showing inverting mechanisms of different angles according to another embodiment of the present invention. Figures 7A-7E show the flipping process in the A direction of Figure 6A.

Figures 8A-8E show the flipping process in the B direction of Figure 6A.

Figure 9 illustrates a two-sided printing method in accordance with an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Referring to Figure 1, there is shown a double-sided printing apparatus in accordance with one embodiment of the present invention. The double-sided printing apparatus 100 is for exposing double-sided photographic paper, and the two-sided exposure of the photographic paper is completed in two steps. The structure of the device will be specifically described below.

The double-sided printing apparatus 100 includes a body 101 on which a paper input mechanism 110, an exposure stage 120, an exposure unit 130, a paper conveying mechanism 140, and a turning mechanism 150 are provided.

The paper input mechanism 110 is used to input an photographic paper for exposure (not shown), which includes a first pinch roller 111 and a paper cutter 112, wherein the paper cutter 112 is located behind the first pinch roller 111 so as to input The paper is cut to the required size. The first pinch roller 111 is driven by a motor 113. The paper cutter 112 is driven by an electric motor 114.

The photo paper input mechanism 110 is followed by an exposure stage 120, and the exposure photo paper enters the exposure stage 120 by means of the paper conveying mechanism 140. The paper conveying mechanism 140 includes a conveyor belt 141 and a second pinch roller 142 and a third pinch roller 143. Wherein the second pinch roller 142 is disposed on the side of the exposure table 120 (left side in the figure) and phase Between the paper input mechanisms 110, a third pinch roller 143 is disposed between the other side of the exposure table 120 (right side in the drawing) and the turning mechanism 150. The conveyor belt 141 sequentially passes through the second pinch roller 142 and the exposure table. 120 and a third pinch roller 143. The third pinch roller 143 is driven, for example, by a motor 144, and the second pinch roller 142 is a driven roller. The conveying direction of these conveyor belts and pinch rolls can be either positive (left to right) or reverse (right to left).

For the photographic paper input from the paper input mechanism 1 10, the second pinch roller 142 guides it into the transfer belt 141 and conveys it to the exposure stage 120 for exposure. Preferably, an adsorption mechanism 170 is also disposed under the exposure stage 120 to closely adhere the paper to the conveyor belt 141, thereby preventing the exposure imaging effect from being affected by the pleats of the paper. The adsorption mechanism 170 is, for example, a centrifugal fan.

The exposure stage 120 is used to accommodate photographic paper for exposure. The exposer 130 above the exposure stage 120 projects a light beam, and exposes an exposed side (lighting surface) of the photographic paper on the exposure stage 120, that is, the first surface, to form a desired image potential on the surface of the photographic paper. Shadow. The exposed photographic paper is guided by the third pinch roller 143 and sent out to the exposure stage 120.

After the first exposure above, the photographic paper needs to be turned over by the flipping mechanism 150 and exposed to the other side. Specifically, referring to Figs. 2A and 2B, the turning mechanism 150 includes a pair of reverse pinch rollers 151, a detector 152 (Fig. 3A), and a flip drive mechanism 153, which are all disposed on the body 101. A pair of reverse pinch rolls 151 are disposed after the 120 exposure stage and adjacent to the third pinch rolls 143. The detector 152 is provided on the output side of the reverse pinch roller 151 for detecting whether or not the leading end of the photographic paper fed by the reverse pinch roller 151 has reached. The distance between the third pinch roller 143 and the reverse pinch roller 151 can be appropriately set so that when the leading end of the paper reaches the point, the rear end that is not pinched by the reverse pinch roller 151 becomes a free end, and is no longer The three pinch rollers are clamped. In a preferred embodiment, in order to reduce the distance between the third pinch roller 143 and the reverse pinch roller 151, the paper may be passed between the third pinch roller 143 and the reverse pinch roller 151 when the paper is conveyed. The bulging is achieved by making the conveying speed of the reverse pinch roller 151 smaller than the conveying speed of the third pinch roller 143.

Referring to FIG. 2A, the turning drive mechanism 153 includes a drive motor 153a, a first gear 153b, a transition gear 153c, and a second gear 153d. The first gear 153b is a pinion gear, and is disposed on the output shaft of the driving motor 153a. The second gear 153d is a large gear, and is driven by the first gear 153b via the transition gear 153c. The pair of reverse pinch rollers 151 are disposed on the sleeve 1510. on. The gear ratio of the first gear 153b and the second gear 153d may be 1:2, and when the first gear rotates one turn, the second gear 153d rotates half a turn (ie, 180 degrees), The driving sleeve 1510 and the reverse pinch roller 151 are rotated by 180 degrees.

Further, in the present embodiment, the reverse pinch roller 151 is further provided with a separate pinch drive mechanism 154 including a drive motor 154a, a third gear 154b, two transition gears 154c, 154d, and a fourth gear 154e. The output shaft of the drive motor 154a is sequentially driven by the third gear 154b, the two transition gears 154c, 154d, and the fourth gear 154e to drive one of the reverse pinch rollers to rotate, thereby pinching the paper.

The flow of the flipping mechanism of the present embodiment will now be described with reference to Figs. 3A-3H, and Figs. 4A-4H, wherein Figs. 3A-3H are in the flipping flow viewed in the direction of A in Fig. 2A, wherein the mechanism shown is an inversion driving mechanism. 4A-4H are the inversion flow viewed in the B direction of Fig. 2A, wherein the mechanism shown is a pinch drive mechanism. 3A-3H and 4A-4H show the state of the turning mechanism at the same time. First, as shown in FIG. 3A and FIG. 4A, the third pinch roller 143 feeds the photo paper 201 which is exposed on the first surface (the A side in the figure) to the exposure table 120, enters the flip pinch roller 151, and flips the pinch feed. Roller 151 continues to drive photographic paper 201 away from exposure station 120. When the detector 152 detects that the front end of the photographic paper 201 reaches the flipping mechanism in the manner described in the foregoing, as shown in FIGS. 3B-3C, 4B-4C, the driving motor 154a of the pinch drive mechanism stops driving one of the flip pinch rollers. The 151 is rotated to stop the pinch. The drive motor 153a of the flip drive mechanism rotates the pair of flip pinch rolls 151 by 180 degrees to reach the position shown in Fig. 3C. The direction of rotation can be either clockwise or counterclockwise. At this time, in the position where the pinch roller is fed, the upward facing surface is already the second surface (ie, the B surface). Further, the pinch drive mechanism 154 restarts the operation, and the reverse pinch roller 151 is driven to introduce the paper 201 toward the exposure table. The introduction flow is as shown in Figs. 3D-3F and 4D-4F. After the photographic paper 201 is re-entered into the exposure stage 120, its unexposed second surface (B side) will become a illuminating surface and exposed. At the same time, the flip pinch roller 151 can be rotated 180 degrees to return to the original position, as shown in Figs. 3E and 3F. Finally, it is again led to the reverse pinch roller 151 via the third pinch roller 143 as shown in Figs. 3H and 4H. At this time, the reverse pinch roller 151 is no longer turned over, but the photographic paper 201 is directly fed to the next flow.

Fig. 5 is a view showing the structure of a double-sided printing apparatus according to another embodiment of the present invention. In this embodiment, the same reference numerals as in the previous embodiment denote the same components. The double-sided printing apparatus 200 of the present embodiment includes a body 101 on which a paper input mechanism 110, an exposure stage 120, an exposure unit 130, a paper conveying mechanism 140, an adsorption mechanism 170, and a turning mechanism 250 are disposed.

Referring to Figures 6A and 6B, the turning mechanism 250 includes a pair of inverted pinch rollers 151, a detector 152 (Fig. 7A), and a flip drive mechanism 153. One pair of flip pinch rollers 151 is disposed on the exposure table After 120 and adjacent to the third pinch roller 143. A drive gear 251a is coaxially disposed on the reverse pinch roller 151. The detector 152 is provided on the output side of the reverse pinch roller 151 for detecting whether or not the leading end of the photographic paper fed by the reverse pinch roller 151 has reached. The distance between the third pinch roller 143 and the reverse pinch roller 151 can be appropriately set so that when the leading end of the paper reaches the point, the rear end that is not pinched by the reverse pinch roller 151 becomes a free end, and is no longer The three pinch rollers are clamped. In a preferred embodiment, in order to reduce the distance between the third pinch roller 143 and the reverse pinch roller 151, the paper may be passed between the third pinch roller 143 and the reverse pinch roller 151 when the paper is conveyed. The bulging is achieved by making the conveying speed of the reverse pinch roller 151 smaller than the conveying speed of the third pinch roller 143.

The difference between this embodiment and the previous embodiment is that instead of using a separate driving mechanism, the driving mechanism is shared with the paper conveying mechanism 140, specifically, as shown in FIG. 5 and FIG. 6A, in the third folder. The feed roller 143 is coaxially provided with a gear 254a and is conveyed via a transmission gear 254b to a drive gear 251a of one of the reverse pinch rollers 151.

The flow of the flipping mechanism of the present embodiment will now be described with reference to Figs. 7A-7E, and Figs. 8A-8E, wherein Figs. 7A-7E are in the flipping flow viewed in the direction of arrow A in Fig. 6A, wherein the mechanism shown is a pinch drive mechanism. 8A-8E are the inversion flow viewed in the B direction of Fig. 6A, wherein the mechanism shown is a flip drive mechanism. 7A-7E and 8A-8E show the state of the turning mechanism at the same time. First, as shown in FIGS. 7A and 7A, the third pinch roller 143 feeds the photographic paper 201 which has been exposed on the first surface (the A side as shown in the figure) to the exposure table 120, enters the flip pinch roller 151, and flips the pinch. Roller 151 continues to drive photographic paper 201 away from exposure station 120. After the detector 152 detects that the front end of the photographic paper 201 reaches the turning mechanism, as shown in FIGS. 7B-7C and 8B-8C, the driving motor 154a of the pinch drive mechanism stops driving one of the flipping pins. The roller 151 is rotated to stop the pinch. The drive motor 153a of the flip drive mechanism drives the pair of reverse pinch rollers 151 to rotate 180 degrees. At this time, in the position where the pinch roller is turned over, the upward facing side is already the B side. Further, the pinch drive mechanism 154 restarts the operation, and the reverse pinch roller 151 is driven to introduce the paper 201 toward the exposure table. The introduction flow is as shown in Figs. 7C-7D and 8C-8D. After the photographic paper 201 is re-entered into the exposure stage 120, its unexposed second surface (B side) will become a illuminating surface and exposed. At the same time, the pair of reverse pinch rollers 151 are rotated 180 degrees to return to the original position. Then, it is again led to the reverse pinch roller 151 via the third pinch roller 143. At this time, the inversion pinch roller 151 is no longer inverting, but the photo paper 201 is directly sent to the next process, as shown in FIG. 7E, 8E. Shown. On the other hand, an exemplary double-sided printing method of the present invention can be summarized by the double-sided printing apparatus described above, and the flow thereof is as shown in FIG. 9. Referring to FIGS. 3A-3H and FIGS. 4A-4H, the method is as follows. Includes the following steps:

Step 301, the photographic paper 201 is introduced into the exposure table 120 and the first surface is exposed to the exposure device 130 for the first exposure;

Step 302, the photographic paper 201 is conveyed by the pair of pinch rolls 143 of the exposure table 120 to the turning mechanism 150, specifically, to the flip pinch roll 151;

Step 303, when the detector 152 detects that the front end of the photographic paper reaches the reverse pinch roller 151, the flip drive mechanism 153 rotates the reverse pinch roller 151 to cause the second surface of the photographic paper 201 to face the exposer 130; The pinch roller 151 can be rotated 180 degrees clockwise or 180 degrees counterclockwise.

Step 304, the photographic paper 201 is sent back to the exposure table 120 by the turning mechanism 150 to perform the second exposure;

Step 305, the photographic paper 201 is sent out from the exposure station 120 via the turning mechanism 150.

For further details of the above double-sided printing method, please refer to the previous description of the double-sided printing apparatus, which will not be described herein.

Therefore, the double-sided printing device requires only one exposure device, and the double-sided printing can be realized by appropriately setting the turning mechanism. Moreover, the double-sided printing device can be additionally provided with a selection mechanism and a turning mechanism on the original single-sided printing device, so that the original single-sided printing device can be fully utilized without reconfiguring the device; Simply flip the front end of the photo paper and the flipping process is quick and easy.

Claims

Rights request

1. A two-sided printing method comprising the following steps:

Passing the photographic paper into an exposure station and facing the exposure device with the first surface, performing a first exposure; transferring the photographic paper from the exposure station to a flipping mechanism;

When detecting that the front end of the photographic paper reaches the turning mechanism, flipping the turning mechanism to face the second surface of the photographic paper facing the exposer;

The photographic paper is conveyed by the turning mechanism to the exposure stage for a second exposure.

2. The method of claim 1 wherein the flipping mechanism is flipped 180 degrees in a clockwise or counterclockwise direction.

3. The method according to claim 1, wherein after the second exposure, the photo paper is further sent from the exposure station through the turning mechanism.

4. The method of claim 1 wherein the step of transferring the photographic paper from the exposure station to a flipping mechanism comprises:

The photographic paper is raised between the exposure station and the turning mechanism.

5. A double-sided printing device comprising:

Photo paper input mechanism for inputting photo paper for exposure;

An exposure stage disposed after the photographic paper input mechanism for accommodating the photographic paper for exposure; a paper conveying mechanism having a conveyor belt passing through the exposure stage for conveying photographic paper into and out of the exposure stage ;

An exposure device that projects a light beam to expose a first surface of the photographic paper on the exposure stage;

Turning mechanism, which includes:

a pair of inverted pinch rolls, disposed after the exposure stage, for pinching the paper into or away from the exposure stage;

a detector for detecting whether the front end of the photographic paper reaches the flip pinch roller; a flip drive mechanism connecting the flip pinch roller for detecting that the front end of the photographic paper arrives at the detector After the pinch rolls are turned over, the pair of flip pinch rolls are driven to rotate such that the second surface of the paper fed by the pair of flip pinch rolls faces the exposer.

The double-sided printing device according to claim 5, wherein the driving mechanism comprises a driving motor, a first gear and a second gear, and the first gear is disposed on an output shaft of the driving motor The second gear is driven by the first gear, wherein the pair of pinch rollers are disposed on a sleeve driven by the second gear.

7. The double-sided printing apparatus according to claim 5, wherein the reverse pinch roller has a separate pinch drive mechanism.

8. The double-sided printing apparatus according to claim 5, wherein the paper conveying mechanism further comprises:

a second pinch roller disposed on a side of the exposure table adjacent to the paper input mechanism for guiding the paper conveyed by the paper input mechanism to the exposure table;

And a third pinch roller disposed on a side of the exposure table adjacent to the turning mechanism for guiding the paper from the exposure table to the reverse pinch roller.

9. The double-sided printing apparatus according to claim 8, further comprising a transmission mechanism for transmitting power of said third pinch roller to said reverse pinch roller.

10. The double-sided printing apparatus according to claim 5, further comprising an adsorption mechanism disposed under the exposure stage to cause the paper to be in close contact with the conveyor belt.