Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
  • G03D15/00—Apparatus for treating processed material
  • G03D15/02—Drying; Glazing

Definitions

• the present invention relates to a method for drying photographic sheet 5 material, and a device for utilization of the method.
• drying photographic sheet material such as potographic prints, negatives, X-ray pictures, graphic film, plates and similar
• drying devices arranged with pairs of feeding
• a further disadvantage is, that the photographic sheet material is normally supplied as a manual operation, when the objects to be dried are fed successively after each other, which means that the
• drying operation involves a continous manual work effort.
• the decribed " method is utilized in particular for plastic coated paper prints, whereas conventional paper prints often are dried while being pressed against a heated sheet metal, e.g. a super glaze plate.
• the object of the present invention is to disclose a method which removes the above discussed disadvantages related to previously used methods for drying plastic coated paper and similar materials, and which -**' facilitates simultaneous and efficient drying of a number of
• the method according to the present invention is mainly characterised in that photographic prints to be dried as a first step are attached against preferably the internal surface of frameshaped structures with a preferably curved line of extension, that said frameshaped structures as
• a second step are arranged attached in a spaced relationship to each other to a rotary arranged supporting structure, thereby forming a fan means, said frameshaped structures with associated supporting structure as a third step being caused to perform a rotary movement while heated air is being supplied to a region adjacent the rotary center of the
• the device for utilization of the method is mainly characterised in that it comprises a rotatably arranged supporting structure, arranged to facilitate attachment of a number of frameshaped structures, preferably having a curved line of extension and forming a fan means, at least one air jet being arranged supplied to a region adjacent to the rotary
• said air jet or air jets being arranged heated to an increased temperature by means of at least one heat source arranged in the flow region, a rotary movement of the supporting structure being arranged to cause the photographic prints attached to the frameshaped structures to be dried by centrifugal action
• Fig. 1 shows a view in longitudinal section of an embodiment of a device according to the present invention
• Fig. 2 shows a cross-sectional view of the embodiment shown in Fi g. 1 at the sectional l ine I I -I I ;
• Fig. 3 shows a principle cross-sectional view, intended to di scl ose how air is di rected through the device shown in Fi gs. 1 and 2 during a drying operation;
• Fig. 4 shows a perspective view of a frameshaped supporting structure, against which photographic prints are attachable
• Fig. 5 shows a perspective view intended to serve as an example of how a frameshaped supporting structure is attached to the example of an embodiment of a device according to the invention as shown in Figs. 1 and 2.
• a basic example of an embodiment of a device according to the present invention comprising a surrounding housing, as a complete unit denominated 1, which surrounds two discshaped members 2, 2 ' , non-rotatably attached against a tubular shaft 3, having its end portions rigidly attached to the housing 1.
• a number of rodshaped electric heaters 4, 4 " , 4" are arranged extending between the discshaped members 2, 2 ' , and the discshaped members 2, 2" are aranged with a number of through recesses, which facilitate an air flow into the space restricted by the rodshaped electric heaters 4, 4 ' , 4".
• the discshaped members 2, 2 ' are arranged located in an intermediate position in relation to two rotary arranged supporting members 5, 5 ' , internally connected by means of a number of rods 6, 6 " .
• the supporting members 5, 5 ' are arranged to facilitate a rotary movement in relation to the housing 1 and the d scshaped members 2, 2 ' with associated electric heaters 4, 4 " , 4".
• the supporting members 5, 5 ' are also arranged with through recesses adjacent to the rotary center, intended to facilitate a free through flow of air.
• Said through recesses are surrounded at the outer side surfaces by outwardly extending tubular members 7, 7 ⁇ ' , which extend through clearance holes taken up in the side wall parts of the housing 1, and serve as inlet members for an air jet from each side portion into the central part of the housing 1.
• a drive motor 8 is further arranged adjacent to an outer side portion of the housing 1, and the rotary movement of the drive motor 8 is transferred by means of a driving belt to one of the tubular members 7, 7 " , in order to impose the aforementioned rotary movement to the supporting members 5, 5 ' .
• the supporting members 5, 5 act as supporting means for a number of frameshaped structures 9, 9 ' , 9", which are utilized to support the photographic prints intended to be dried.
• Said frameshaped members 9, 9 ' , 9" are in this example of an embodiment arranged located spaced from each other in an overlapping configuration,
• the housing 1 has a cross-sectional configuration similar to the fan housing of a centrifugal fan, and that the outlet opening 10 is arranged adjacent to a point immediately before the point where the outer portions of the
• frameshaped structures 9, 9 ' , 9 describe a rotary movement immediately adajacent to the internal surface of the housing 1.
• the frameshaped structures 9, 9 ' , 9" include preferably a frame having a curved extension, arranged surrounding a reticular or perforated
• said frameshaped structures do advandageously include a number of internally spaced and outwardly extending studshaped members 11, 11 ' by two opposed side portions, intended to facilitate connection with grooves 12, 12 ' , 12" having a curved line of extension and taken up in the facing side surfaces of the
• Said grooves 12, 12 ' , 12" are adjacent to a peripheral outer portion arranged partly open, and adjacent to the opposed end portion arranged surrounding a pressure acting spring means 13, and facilitate thus insertion of a frameshaped structure 9, 9', 9" while the pressure acting spring means 13 is being compressed, and thereafter displacement of the inserted frameshaped structure 9, 9", 9" to a contact position against the opposed end portion of the groove 12, 12 ' , 12", in which position the inserted frameshaped supporting structure 9, 9', 9" is held in an intermediate position between the supporting members 5, 5 ' , having a curved line of extension which differs from a circle circumference having a center corresponding to the rotary center of the supporting members 5, 5 ' .
• the photographic prints intended to be dried are attached against the internal surface of said frameshaped structures 9, 9 ' , 9", and with the picture surface directed away fro n the supporting surface.
• the frameshaped structures 9, 9 ' , 9" are arranged with suitable means of attachment 14, 14 ' of previously known type, e.g. spring loaded longitudinally extending members or other pressure acting means.
• suitable means of attachment 14, 14 ' may advantageously be arranged to facilitate displacement to suitable points along the surface of the frameshaped structures 9, 9 ' , 9",. in order to facilitate adjustment to existing sizes of the prints to be dried.
• attachment against the internal and curved surface also results in that the frameshaped structures 9, 9 ' , 9" can be placed in direct contact against a table surface or other supporting surface, and with the photographic prints completely protected from contact against such a supporting surface.
• a pivotally attached lidshaped member 15 n the housing 1 is located in an open position, whereafter the frameshaped structures 9, 9 ' , 9" are attached against the supporting members 5, 5 ' .
• the lidshaped member 15 is closed, whereafter the drive motor 8 is started. Simultaneously, an electric voltage is supplied to the rodshaped electric heaters 4, 4 ' , 4", which are thereby heated.
• the drive motor 8 imposes a rotary movement on the supporting members 5, 5 ' and the frameshaped structures 9, 9 ' , 9" attached to same.
• the air now being sucked in to the central portion of the housing 1 is heated by the rodshaped electric heaters 4, 4 ' , 4" centrally located within the housing 1, whereafter heated air jets are caused to flow past the photographic prints attached against the frameshaped structures 9, 9 ' , 9", and which act as a centrifugal fan.
• sheet metal guides may advantageously be disposed extending between the supporting members 5, 5 ' , located extending in an intermediate relationship to the frameshaped structures 9, 9 ' , 9" (not shown).
• the voltage feed to the drive motor 8 and the rodshaped electric heaters 4, 4 ' , 4" is interrupted, whereafter the lidshaped member 15 is opened.
• the 10. frameshaped. structures 9, 9 ' , 9" can thereafter be removed, and replaced by other-frameshaped structures 9, 9 ' , 9", which during the work period have been fitted with new photographic prints to be dried.
• the drying process can thus be carried out as a substantially continous operation.
• the described: and shown device thus causes existing water on the photographic prints to be thrown off due to centrifugal action, both sides being dried due to by-flow of heated air. As a result, a rapid,
• the present invention also facilitates attachment of photographic prints in a substantially completely damp condition, and 5 that the picture surface is dried without same being subjected to any mechanical contact. This feature also facilitates that attachment of the photographic prints is carried out prior to a rinsing operation, and that the frameshaped structures 9, 9 ' , 9" thereafter are lowered into a rinsing tank, thereby preventing the prints from taking up contact against each other.
• the frameshaped structures 9, 9 ' , 9" can thereafter be directly moved to the device according to the present invention.
• Individually driven fan means can be located outside the housing, but also surrounded by the housing 1, and a heating source may further advantageously be arranged adjacent to such a fan means.
• the frameshaped structures 9, 9 ' , 9" must not necessarily be arranged having a curved line of extension, and may either be located spaced from each other in a not overlapping relationship, or located as shown and described. They may also be located having a substantially radial line of extension from the rotary center, as well as inclined in relation to the rotary center, in order to form a configuration resembling a propeller or turbine.
• the number of air iniets to the housing can be varied as desired.
• a second embodiment can be mentioned the possibility to mount/demount the frameshaped structures 9, 9 ' , 9" by means of a linear displacement movement from one side portion of the housing 1 in direction towards the opposed side portion.
• the housing 1 is then arranged surrounding a rotary supporting structure, which in its simpliest form may comprise of one supporting member 5, from which pairs of supporting profiles, rails or similar extend, intended to grip two opposed edge portions of each frameshaped structure 9, 9 ' , 9".
• Such a supporting structure may obviously also include two from each other spaced supporting members 5, 5 ' , e.g. arranged as a number of radially extending spikes, internally connected by pairs of co-acting supporting profiles or similar, which grip and support inserted frameshaped structures 9, 9 ' , 9".
• Previously discussed lidshaped member 15 is in this case obviously arranged forming a part of a side piece of the housing 1.

Applications Claiming Priority (2)

Publications (1)

Family

ID=20364513

Family Applications (1)

Country Status (3)

Cited By (1)

Citations (2)

• 1986
  • 1986-05-13 SE SE8602173A patent/SE452195B/sv not_active IP Right Cessation
• 1987
  • 1987-05-13 AU AU73589/87A patent/AU7358987A/en not_active Abandoned
  • 1987-05-13 WO PCT/SE1987/000242 patent/WO1987007040A1/en unknown

Patent Citations (2)

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