Photocopying – Projection printing and copying cameras – Detailed holder for original
Reexamination Certificate
2001-12-19
2003-10-28
Nguyen, Henry Hung (Department: 2851)
Photocopying
Projection printing and copying cameras
Detailed holder for original
C355S040000, C355S041000
Reexamination Certificate
active
06639655
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a photosensitive material magazine. More particularly, the present invention relates to a photosensitive material magazine in which a roll of photosensitive material is contained, and in which the photosensitive material can be fed and wound back in a state free from being scratched or damaged.
2. Description Related to the Prior Art
A photographic printer is loaded with a photographic paper magazine, which accommodates a photographic paper roll. The paper magazine includes a magazine case and an openable lid, the magazine case containing the photographic paper roll. A support shaft is contained in the magazine case in a removable and rotatable manner, and supports the photographic paper roll. The support shaft is constituted by right and left shafts coupled together in the axial direction. Those are inserted in axial end holes at ends of a winding spool of the photographic paper roll, and firmly interconnected as a single support shaft. Flanges are secured to the right and left shafts, and contact end faces of the photographic paper roll to neaten paper turns.
Photographic paper must be handled in a light-shielded state before it can be inserted in the paper magazine. JP-A 6-161052 discloses a use of light-shielding sheets, which are formed from plastic material such as polyethylene terephthalate, and fully wrap the photographic paper roll. The light-shielding sheets include a light-shielding leading sheet and light-shielding lateral sheets. The light-shielding leading sheet has a strip shape, and has a rear end attached to a front end of the photographic paper by adhesive tape. The light-shielding leading sheet has a width equal to or slightly greater than that of the photographic paper, and wraps the outermost turn of the photographic paper to shield light. The light-shielding lateral sheets are spliced to lateral edges of the light-shielding leading sheet as viewed in the longitudinal direction. The light-shielding lateral sheets are disposed to cover the two end faces of the photographic paper roll, and have outer ends inserted in and attached to the axial end holes of the winding spool. Thus, the elements are shielded from ambient light, including the edges of the peripheral face and the axial end holes of the winding spool.
Spliced portions between the light-shielding leading sheet and the light-shielding lateral sheets are structured for being broken easily. Only if the front end of the light-shielding leading sheet is pulled forcibly, the light-shielding leading sheet can be broken away from the light-shielding lateral sheets. Immediately after this, the front end continues being pulled, so that the photographic paper is pulled out after the light-shielding leading sheet. After the front end the photographic paper is pulled out of the paper magazine, the light-shielding leading sheet is cut away.
In
FIG. 18
, a state of the photographic paper roll secured to the support shaft is depicted. In the drawing, a winding spool
17
is supported by a support shaft
14
. Flanges
15
and
16
are disposed at ends of the support shaft
14
. There is photographic paper
13
, which has a front end with a light-shielding leading sheet
10
secured thereto. Light-shielding lateral sheets
11
and
12
are spliced to the light-shielding leading sheet
10
along spliced portions
18
and
19
.
After the light-shielding leading sheet
10
is removed, the light-shielding lateral sheets
11
and
12
remain between the end faces of the photographic paper
13
and the flanges
15
and
16
in a state where broken sheets
11
a
and
12
a
being bent back toward the peripheral face are deposited.
The printer draws out the photographic paper from the paper magazine, and subjects the same to a printing process. Should the unused portion of the photographic paper remain drawn out of the magazine, it is likely that the portion is fogged or exposed after the printing process. Thus, the photographic paper is wound back into the magazine by rotating the support shaft backwards, to dispose the front end inside the magazine or to the vicinity of the passageway.
However, the photographic paper
13
if wound back becomes mounted on the broken sheets
11
a
and
12
a
which are the unwanted remainder of the light-shielding lateral sheets
11
and
12
. It is likely that lateral edges of the photographic paper
13
extending in the longitudinal direction are frictionally contacted and scratched by the broken sheets
11
a
and
12
a
. Quality in the printing may be lowered, as the printed density may be conspicuously changed at the lateral edges.
The smaller the diameter of the roll of the photographic paper
13
, the longer a contacted lateral portion of the photographic paper
13
contacted by the flange
15
or
16
at the time of winding back. So quality in the printing may be lowered because the damaged lateral portions of the photographic paper
13
may be extremely long.
SUMMARY OF THE INVENTION
In view of the foregoing problems, an object of the present invention is to provide a photosensitive material magazine in which a roll of photosensitive material is contained, and in which the photosensitive material can be fed and wound back in a state free from being scratched or damaged, specifically in portions of lateral edges.
In order to achieve the above and other objects and advantages of this invention, a photosensitive material magazine, for containing a photosensitive material roll of photosensitive material, includes a magazine case. A support shaft is contained in the magazine case in a rotatable manner, and secured to an axis of the photosensitive material roll in a rotationally immovable manner. First and second flanges are disposed on the support shaft, for neatening end faces of the photosensitive material roll. A passageway is formed in the magazine case, for passage of the photosensitive material in and out. A receiving portion is formed to project from an edge portion of the first flange toward the second flange, for defining a passage space between edges thereof, the passage space allowing passage of the photosensitive material extending from the photosensitive material roll toward the passageway, wherein when the support shaft is rotated in a winding direction, the receiving portion temporarily winds a portion of the photosensitive material extending out of the passage space.
The support shaft is rotatable in an unwinding direction and the winding direction. Furthermore, a bearing device secures the first and second flanges to the support shaft, changeable in first and second states, for setting the first flange rotatable relative to the support shaft, and for setting the first flange rotationally immovable relative to the support shaft. While the photosensitive material is drawn from the photosensitive material roll, the bearing device is in the first state, for allowing the support shaft to rotate in the unwinding direction relative to the first flange stopped by the photosensitive material and the receiving portion. When the support shaft is rotated in the winding direction, the bearing device is in the second state, for rotating the first flange together with the support shaft, thereby temporarily to wind the photosensitive material on the receiving portion.
The photosensitive material roll includes a tubular winding spool on which the photosensitive material is wound in a roll form. The bearing device includes first and second cores, fitted in respectively first and second ends of the winding spool, having first and second axial holes in which the support shaft is fitted, for transmitting rotation of the support shaft to the photosensitive material roll. First and second axial openings are formed in the first and second flanges, for receiving insertion of the first and second cores.
The bearing device further includes first and second bearing mechanisms for keeping the first and second flanges rotatable about the first and second cores, thereby to set the first state. A braking mechanism is
Fuji Photo Film Co. , Ltd.
Nguyen Henry Hung
Sughrue & Mion, PLLC
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