EP1296185A1 - Dispositif pour enlever l'humidité de suppports photographiques en forme de feuilles - Google Patents

Dispositif pour enlever l'humidité de suppports photographiques en forme de feuilles Download PDF

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Publication number
EP1296185A1
EP1296185A1 EP01122803A EP01122803A EP1296185A1 EP 1296185 A1 EP1296185 A1 EP 1296185A1 EP 01122803 A EP01122803 A EP 01122803A EP 01122803 A EP01122803 A EP 01122803A EP 1296185 A1 EP1296185 A1 EP 1296185A1
Authority
EP
European Patent Office
Prior art keywords
wiper lip
sheet
squeezing surface
lip
supports
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP01122803A
Other languages
German (de)
English (en)
Inventor
Stefan Huber
Wilfried Hehn
Ernst Schweiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AgfaPhoto GmbH
Original Assignee
Agfa Gevaert AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Priority to EP01122803A priority Critical patent/EP1296185A1/fr
Priority to US10/251,510 priority patent/US6648524B2/en
Publication of EP1296185A1 publication Critical patent/EP1296185A1/fr
Pending legal-status Critical Current

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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 invention relates to a device for removing moisture of sheet-shaped photographic substrates according to the generic term of claim 1.
  • Sheet-shaped photographic supports such as in the form of Single sheets of exposed photo paper are usually used developed only in so-called minilabs. In the large laboratory, however, they are Single images exposed on long paper tapes, which are only after development and drying can be cut into single sheets.
  • the treatment such long paper tapes can be realized with much simpler means, than the treatment of single sheets. Even with long ones Paper tapes can achieve higher throughput speeds. justified this is because when treating long paper tapes Threading operations are practically completely eliminated. This is usually the case the beginning of the next is already glued to the end of one paper tape or when the machine is at a standstill for cleaning or service purposes an intermediate belt is drawn into the machine, with the help of which when restarting the beginning of a new paper tape the machine can be pulled through.
  • each sheet when processing single sheets, each sheet must have its leading edge in every treatment facility or every pair of transport rollers to be threaded on its way through the machine. This also applies to Devices for dehumidifying the substrates between the individual Wet treatment stages and before the dryer.
  • the task is solved by a device for dehumidifying leaf-shaped photographic layer support with the characteristic features of claim 1.
  • a device for dehumidifying leaf-shaped photographic layer support with the characteristic features of claim 1.
  • a wiper lip in connection with a squeezing surface between two pairs of transport rollers a significantly improved dehumidification effect, especially with small formats.
  • the result is less carryover from that Layer of adhering treatment liquid from a treatment bath in the following treatment bath. This allows the regeneration rates of the individual treatment baths can be reduced. simultaneously the achievable image quality can be increased because, for example Traces of developer running on the surface of the images avoided become.
  • the squeezing surface advantageously has a low coefficient of friction to prevent the front edge or front from sticking Prevent area of the substrate. Such clinging would lead to a paper jam that destroys the cut sheet could, or at least a manual intervention to eliminate the Error.
  • the squeeze surface at an angle between 5 ° and 15 ° against the Transport plane inclined for the sheet-shaped substrate. This angular range ensures a safe insertion of the front edge of the Layer carrier between the wiper lip and the squeezing surface without losing the Block leading edge. Likewise, the proposed angular range surface adhesion of the layer support to the squeezing surface avoided.
  • Photo paper that is already being transported through a treatment tank has a low inherent rigidity. If the leading edge is one Single sheet against the pair of feed rollers on the input side pushed a resistor like that through the wiper lip and the squeeze surface is formed, the single sheet can easily become one Deform the loop and thus lead to a malfunction. Because the inherent rigidity of paper decreases the further the leading edge extends conveyed out the nip of the pair of transport rollers on the input side is a fine match between the distance of the wiper lip to the pair of feed rollers on the input side and the contact pressure the wiper lip on the squeezing surface.
  • the contact pressure the wiper lip is set so that a photographic Support with a tensile force between 5 Newton and 30 Newton to a meter of paper width, through the gap between the wiper lip and squeeze surface can be pulled. If the contact pressure Moving in this area should be the distance between the input Transport roller pair and the wiper lip a value of Do not exceed 40 mm.
  • the service life of the wiper lips can be improved enormously if measures are taken be taken to ensure that the sharp side edges the photographic support is not always the same Apply the wiping lips. According to the invention it is therefore provided the single sheets not on one line, but with different ones to transport lateral displacement through the developing device.
  • This lateral offset of each layer support to the one in front The substrate is advantageously redetermined for each substrate and Z. B. determined via a random generator.
  • the moisture removal device shown in Fig. 1 has an input-side pair of transport rollers 2 and an output side Transport roller pair 3 on. There is between these pairs of rollers an oblique guide ramp 4 with the squeeze surface 8. On the squeeze surface 8 puts the tip of the elastic wiper lip 5 on the holder 6 is attached. Via a spring, not shown, the force of which is adjustable is, the holder 6 is rotated around the fixed bearing 7, so that the Wiping lip 5 presses the squeezing surface 8 with an adjustable force.
  • the distance A between the tip of the elastic wiper lip 5 and the input side Transport roller pair 2 must not be larger than 40 mm.
  • the inclined position of the squeezing surface 8 ensures that from one through the input-side transport roller pair 2 into the device photographic substrates only carried the leading edge comes into contact with the squeezing surface 8. This makes a flat Avoid sucking the wet paper on the squeezing surface.
  • the contact pressure of the elastic wiper lip 5 must, for example be adjusted via the adjustable spring, not shown, so that for a trouble-free operation is guaranteed and on the other good stripping result is achieved.
  • the pulling force needed is a single sheet with the format 13x18 cm in the longitudinal direction to pull through the gap between the wiper lip 5 and the squeezing surface 8, the contact pressure should be set so that there is a tensile force of about 3.5 Newtons.
  • the squeeze surface 8 in front of and behind the point at which to provide the elastic wiper lip 5 with wide longitudinal grooves, so that only narrow webs come into contact with the single sheet and contact across the entire blade width only in the area of the wiper lip consists. In this way it is even better to vacuum the surface wet underside of the photographic support on the squeeze surface 8 prevents without reducing the efficiency of the device is reduced.
  • Fig. 2 is part of a conveyor, for example by a Treatment tank of a developing device according to the invention, shown.
  • the pairs of transport rollers 9 stored in the frame 10 is for reasons of clarity only the one behind the photographic Layer carrier shown roller.
  • the service life of the wiper lip can thus be extended extend many times.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP01122803A 2001-09-21 2001-09-21 Dispositif pour enlever l'humidité de suppports photographiques en forme de feuilles Pending EP1296185A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01122803A EP1296185A1 (fr) 2001-09-21 2001-09-21 Dispositif pour enlever l'humidité de suppports photographiques en forme de feuilles
US10/251,510 US6648524B2 (en) 2001-09-21 2002-09-19 Device for removing moisture from sheets of photographic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01122803A EP1296185A1 (fr) 2001-09-21 2001-09-21 Dispositif pour enlever l'humidité de suppports photographiques en forme de feuilles

Publications (1)

Publication Number Publication Date
EP1296185A1 true EP1296185A1 (fr) 2003-03-26

Family

ID=8178706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01122803A Pending EP1296185A1 (fr) 2001-09-21 2001-09-21 Dispositif pour enlever l'humidité de suppports photographiques en forme de feuilles

Country Status (2)

Country Link
US (1) US6648524B2 (fr)
EP (1) EP1296185A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302956A1 (fr) * 1987-08-11 1989-02-15 RETHETO Filmtechnik Theilemann & Co. Dispositif de nettoyage de film
EP0491049A1 (fr) * 1990-07-09 1992-06-24 Fuji Photo Film Co., Ltd. Dispositif de traitement photographique pour materiaux photosensibles a base d'halogenure d'argent
US5339129A (en) * 1992-02-14 1994-08-16 Agfa-Gevaert Aktiengesellschaft Device for wiping liquids off running webs of photographic material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127082A (en) * 1975-09-26 1978-11-28 Sharp Kabushiki Kaisha Wiper roller for drying a wet sheet in a copying machine
US4117604A (en) * 1977-03-31 1978-10-03 Pako Corporation Dryer for photographic processors
DE4030060C2 (de) * 1990-09-22 1999-09-16 Agfa Gevaert Ag Vorrichtung zur Reinigung oder Entfeuchtung von bandförmigem Material
DE4141192A1 (de) 1991-12-04 1993-06-09 Agfa-Gevaert Ag, 5090 Leverkusen, De Fluessigkeitsabstreifer fuer fotografisches material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302956A1 (fr) * 1987-08-11 1989-02-15 RETHETO Filmtechnik Theilemann & Co. Dispositif de nettoyage de film
EP0491049A1 (fr) * 1990-07-09 1992-06-24 Fuji Photo Film Co., Ltd. Dispositif de traitement photographique pour materiaux photosensibles a base d'halogenure d'argent
US5339129A (en) * 1992-02-14 1994-08-16 Agfa-Gevaert Aktiengesellschaft Device for wiping liquids off running webs of photographic material

Also Published As

Publication number Publication date
US6648524B2 (en) 2003-11-18
US20030059220A1 (en) 2003-03-27

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