Photography – Fluid-treating apparatus – Having photographic medium feed
Reexamination Certificate
2001-06-07
2003-12-02
Rutledge, D (Department: 2851)
Photography
Fluid-treating apparatus
Having photographic medium feed
C396S617000, C396S620000, C492S030000
Reexamination Certificate
active
06655860
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a brush roller for brushing a surface of a photosensitive material at a time of processing of the photosensitive material by a processing solution. More particularly, the present invention relates to a brush roller in which a web-like member provided with wire members is wound around a peripheral surface of a roller main body in a helical manner.
The present invention further relates to a photosensitive material processing apparatus for brushing a surface of a photosensitive material by a brush roller, in which a web-like member provided with wire members is wound around a roller main body in a helical manner, at a time of processing the photosensitive material by a processing solution.
The present invention also relates to a mounting structure of a pair of rollers provided in a photosensitive material processing apparatus for processing a photosensitive material such as a photosensitive surface printing plate or the like by a processing solution and transferring the photosensitive material while holding therebetween.
The present invention still further relates to a spray pipe, a pair of which is provided in a photosensitive material processing apparatus for processing a photosensitive material such as a surface printing plate or the like by a processing solution so as to be arranged in upper and lower portions with respect to a transferring path for the photosensitive material, and discharging the processing solution toward the photosensitive material.
The present invention yet further relates to a filter case provided in a photosensitive material processing apparatus for processing a photosensitive material or the like by a processing solution, to which a filter for removing a solid material in the processing solution is installed.
2. Description of the Related Art
<<Prior Art 1.>>
A photosensitive material includes a photosensitive surface printing plate (hereinafter, referred to as “PS printing plate”) in which a photosensitive layer is formed on a surface of a supporting body employing aluminum or the like. Further, the PS printing plate includes a so-called photo polymer printing plate on which a photo polymerization layer is formed as the photosensitive layer.
In a development processing apparatus for processing a development of an image exposed PS printing plate (hereinafter, referred to as “PS printing plate processor”), an image is formed by dipping the PS printing plate into a developing solution so as to swell the photosensitive layer (photo polymerization layer) and removing the photosensitive layer from a portion on the supporting body. Further, in the PS printing plate processor, the structure is made such that a removal of the unnecessary photosensitive layer from the portion on the supporting body can be promoted by brushing the surface of the PS printing plate dipped into the developing solution by a brush roller.
In this case, the brush roller used in the PS printing plate processor includes a cloth to which wire members are previously attached, that is, a structure in which a woven wire cloth corresponding to a web-like member is wound around a roller main body in a helical manner. In conventional, in the brush roller using the woven wire cloth, a back surface side of the woven wire cloth (a surface to which the woven wires are not attached) is bonded to a peripheral surface of the roller main body by an adhesive agent or the like, however, in the case of using the adhesive agent, there is a risk that the adhesive agent runs over the woven wire cloth so as to bind the wire members, and a bonding performance is reduced by the processing solution such as the developing solution or the like, whereby the woven wire cloth is peeled.
Accordingly, there has been proposed a brush roller structured such that a woven wire cloth wound around a roller main body in a helical manner is mechanically fixed to both end portions of an axial portion of the roller main body in a portion out of an area opposing to the PS printing plate by using a band or the like.
However, when the woven wire cloth is dipped into the processing solution such as the developing solution or the like, an elongation is generated in the woven wire cloth to no small extent (for example, about 0.3% after several months in the developing solution processing the PS printing plate). Further, a torsional force is applied to the woven wire cloth wound around the roller main body in a helical manner due to a contact pressure given by the wire members being contact with the PS printing plate.
Accordingly, an elongation is generated in the woven wire cloth and the winding with respect to the roller main body is loosened, in the structure made such that the woven wire cloth is simply fixed to both end portions along the axial direction of the roller main body. Further, the winding tightness is generated in one end side of the roller main body due to the torsional force applied to the woven wire cloth, and when the woven wire cloth is tensioned due to the winding tightness, there is a case that another end side is extended and a gap is generated between the woven wire cloths. The looseness and the gap in the woven wire cloth mentioned above appears on the surface of the PS printing plate as a surface irregularity so as to reduce a finish quality of the PS printing plate.
<<Prior Art 2.>>
As mentioned above, the brush roller used for processing the PS printing plate includes the cloth to which the wire members are previously attached, that is, the structure in which the woven wire cloth corresponding to the web-like member is wound around the roller main body in a helical manner.
In this case, in the case that the woven wire cloth is wound around the roller main body in a helical manner, a boundary portion between the woven wire cloths disposed adjacent to each other along the axial direction of the roller main body is generated around the roller main body in a helical shape. A density of the wire materials is reduced in the boundary portion of the woven wire cloth.
On the other hand, in a photo polymer printing plate employed in a computer to plate (CTP) or the like, it is necessary to increase a contact pressure applied to the PS printing plate by the wire members at a time of brushing.
However, in the case of increasing the contact pressure at a time of brushing, a surface irregularity of density of the wire members in the boundary portion of the woven wire cloth wound around the roller main body appears as a streak-like surface irregularity on the surface of the PS printing plate so as to reduce a finish quality of the image formed in the PS printing plate.
There is a case that the streak-like surface irregularity mentioned above clearly appears if the respective contact portions of the boundary portions of the woven wire cloths of two brush rollers with the surface of the PS printing plate are close to each other or overlapped with each other when brushing the surface of the PS printing plate, for example, with using two brush rollers.
<<Prior Art 3.>>
In the photosensitive material processing apparatus, a process such as a development or the like is performed by a plurality of processing solutions by dipping the photosensitive material into the processing solution while transferring the image exposed photosensitive material, and spraying the processing solution onto the surface of the photosensitive material.
For example, in the PS printing plate processor corresponding to the photosensitive material processing apparatus for processing the photosensitive surface printing plate (PS printing plate) as the photosensitive material, there are provided a plurality of processing steps using the processing solution such as a developing step of dipping the PS printing plate into the developing solution so as to process, a water washing step of spraying a water washing water to the PS printing plate so as to perform a water washing process, a desensitization step of applying a desensitization pr
Matsuda Shin-ichi
Nozawa Ryoei
Yamamoto Hideto
Fuji Photo Film Co. , Ltd.
Rutledge D
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