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Photosensitive material processing apparatus and photosensitive material processing method using the same

Imported: 24 Feb '17 | Published: 06 Jan '04

Tsukasa Sato, Yoko Usui

USPTO - Utility Patents

Abstract

At least two (groups of) sensors forming an insertion detection sensor are offset from each other in the conveyance direction of a photosensitive material. An insertion speed, which is different for each manual insertion event, is obtained based on the time difference when sensors that have been offset from each other detect the leading end of the photosensitive material. The length of the photosensitive material in the conveyance direction thereof is accurately computed based on the insertion speed and other information. By correcting the errors due to the changeable insertion state of the photosensitive material caused by manual insertion by the operator, the process area of the photosensitive material, required for calculating the amount of replenisher to be replenished, is accurately obtained. Therefore, the amount of the replenisher is appropriately determined and the process capacity of the developer or the fixing solution can constantly be maintained at the satisfactory level.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates an automatic developing apparatus of the present embodiment.

FIG. 2 is a perspective view of the automatic developing apparatus of the present embodiment.

FIG. 3 is a plan view showing relative positions of an insertion detection sensor and a pair of insertion rollers.

FIG. 4 is a control block diagram showing a process area computing section.

FIG. 5 is a control flowchart illustrating a routine for computing the length and width of a sheet film in the process area computing section.

Claims

1. A photosensitive material processing apparatus including a conveyance roller pair disposed near an insertion opening, which roller pair nips the leading end of a photosensitive material and transports the photosensitive material at a predetermined conveyance speed (V

R) when the photosensitive material is inserted until it is nipped by the conveyance roller pair, the photosensitive material processing apparatus comprising:

2. An apparatus according to claim 1, wherein the sensors detect the length (W) of the photosensitive material in the width direction thereof.

3. An apparatus according to claim 2, wherein the detecting time difference (t) is the time difference between the time when a first sensor group detects the photosensitive material and the time when a second sensor group adjacent to the first sensor group in the conveyance direction detects the photosensitive material.

4. An apparatus according to claim 3, wherein the photosensitive material detecting time (X) of the sensor is the time period between the time when the reference sensor group detects the leading end of the photosensitive material and the time when the same sensor group detects the trailing end of the photosensitive material.

5. An apparatus according to claim 4, wherein the correcting means further includes:

6. An apparatus according to claim 5, wherein the elimination of the effect of the insertion time is conducted using the equation (1) below:

L=(

X−L

IN

/V

H

V

R

+L

IN   (1)

wherein L: the length of the photosensitive material in the conveyance direction thereof; V

R: the conveyance speed; L

IN: the insertion distance; V

H: the insertion speed; and X: the time period between the time when a reference sensor group detects the leading end of the photosensitive material and the time when the same sensor group detects the trailing end of the photosensitive material.

7. An apparatus according to claim 6, wherein the process area computing means computes the process area of the photosensitive material by multiplying the length (W) of the photosensitive material in the width direction thereof by the length (L) of the same in the conveyance direction thereof.

8. An apparatus according to claim 7, which obtains detecting time difference (t′) between the detecting time of the second sensor group and the detecting time of the third sensor group adjacent to the second sensor group in the conveyance direction, and then obtains acceleration of the insertion speed based on t and t′.

9. A photosensitive material processing apparatus including a conveyance roller pair disposed near an insertion opening, which nips the leading end of a photosensitive material and transports the photosensitive material at a predetermined conveyance speed (V

R) when the photosensitive material is inserted until it is nipped by the conveyance roller pair, the photosensitive material processing apparatus comprising:

10. An apparatus according to claim 9, wherein the photosensitive material detecting time (X) counted by the reference sensor is the time period between the time when a reference sensor group detects the leading end of the photosensitive material and the time when the same sensor group detects the trailing end of the photosensitive material.

11. An apparatus according to claim 10, wherein the length (L) of the photosensitive material in the conveyance direction thereof is computed using the equation (1) below:

L=(

X−L

IN

/V

H

V

R

+L

IN   (1)

wherein L: the length of the photosensitive material in the conveyance direction thereof; V

R: the conveyance speed; L

IN: the insertion distance; V

H: the insertion speed; and X: the time period between the time when a reference sensor group detects the leading end of the photosensitive material and the time when the same sensor group detects the trailing end of the photosensitive material.

12. An apparatus according to claim 11, which obtains detecting time difference (t′) between the detecting time of the second sensor group and the detecting time of the third sensor group adjacent to the second sensor group in the conveyance direction, and then obtains acceleration of the insertion speed based on t and t′.

13. A photosensitive material processing method, comprising the steps of:

L=(

X−L

IN

/V

H

V

R

+L

IN   (1)

14. A method according to claim 13, wherein the step (d) for obtaining the detecting time (X) during which the reference sensor group has detected the photosensitive material is a step for obtaining the time period between the time when the reference sensor group detects the leading end of the photosensitive material and the time when the same sensor group detects the trailing end of the photosensitive material.

15. A method according to claim 13, further comprising reading out a detecting time difference (t′) between the detecting time of the second sensor group and the detecting time of the third sensor group, and then computing acceleration of the insertion speed based on t and t′.