US3438140A - Drier for photographic layer supports in sheet form - Google Patents

Drier for photographic layer supports in sheet form Download PDF

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Publication number
US3438140A
US3438140A US566691A US3438140DA US3438140A US 3438140 A US3438140 A US 3438140A US 566691 A US566691 A US 566691A US 3438140D A US3438140D A US 3438140DA US 3438140 A US3438140 A US 3438140A
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US
United States
Prior art keywords
path
drier
air
blower
tubes
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.)
Expired - Lifetime
Application number
US566691A
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English (en)
Inventor
Roland Koehler
Rudolf Birk
Hans Dieter Frick
Harald Fengler
Erwin Geyken
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.)
Agfa Gevaert NV
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Agfa Gevaert NV
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 NV filed Critical Agfa Gevaert NV
Application granted granted Critical
Publication of US3438140A publication Critical patent/US3438140A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G03D15/022—Drying of filmstrips

Definitions

  • each tube is of semicylindrical configuration and the inclined end wall faces in the direction of movement of the sheet material through the apparatus.
  • the air passage in each tube is preferably located at a point in the inclined end wall closer the shorter of the two flattened side walls.
  • This invention relates to a drier for photographic layer supports in sheet form, especially sheet film.
  • Such driers are known with a series of transport rollers arranged on both sides of the path of the layer support, blower tubes being arranged between the rollers to blow onto the layer support dry air which enters the tubes from their ends at both sides.
  • blower tubes direct streams of air extending over the whole width of the layer support substantially normal to said layer support.
  • the present invention provides a drier for photographic layer supports in sheet form, especially sheet film, said drier having a succession of transport rollers for the layer supports, arranged on both sides of the path of the supports, and between the rollers, in the transport direction, blower tubes for directing air onto the supports, the said tubes having a cross section so deviating from the circular, and having exit apertures for the air so arranged in a tube surface inclined with respect to the path of the supports, that after exit from said surface the air passes along it and, when it becomes clear of said surface, flows in a direction tangential or approximately tangential to the layer supports.
  • the blower tubes are of near trapezium shaped cross section, the parallel sides of the trapezium being arranged perpendicular to the path of the layer supports, the rear side with respect to said path being of cylindrical curvature and the side' facing said path being inclined thereto at an angle in a range close to 45, an exit aperture in the tube being in the latter surface at a point nearer to the shorter than to the longer parallel side.
  • the exit aperture in a tube is in the form of a slit extending over a distance corresponding to the relevant dimension of the largest layer support to be dried in the drier.
  • This construction allows the use of a simple manufacturing method, namely the milling of the slit, and ensures a sufliciently even distribution of air over the whole width of the layer support.
  • FIG. 1 is a diagrammatic sectional elevation of a drier according to the invention.
  • FIG. 2 is a cross-section of a blower tube of the drier of FIG. 1.
  • a large number of pairs of transport rollers 2, 3 which are driven by conventional drive, not illustrated, e.g. by way of bevel gears.
  • the rollers are supported in frames 4 which can be inserted into corresponding recesses 5a in partitions 5 which are normal to the roller axis and of which only one is visible in the drawing.
  • the rollers are made of butyl rubber, polyethylene, hardened paper or the like.
  • the drier is intended to be fed with the photographic layer supports to be dried, at an opening 1a in the housing, either by hand or automatically from a known type of continuous developing device in the case of sheet film.
  • the sheet film for example, passes downwards in the drier. This construction is of advantage, but the drier could be adapted for horizontal passage of the sheet film.
  • a pair of blower tubes 6, 7 is arranged, one on each side of the path of the sheets and spaced from said path.
  • the blower tubes 6, 7 are mounted in the partitions 5.
  • One partition 5 is part of an air supply channel of large cross-section, into which air is blown by a blower 8 through a pipe 9.
  • the blower 8 i mounted in a housing 10 which is attached to the housing 1. Between the housing 1 and the housing 10 there is an air passage 11, through which air can be aspirated from the drying chamber by the blower 8.
  • the chamber 10 also has an opening 10a, so that fresh air can also be aspirated into it.
  • a further pipe 12 branches off, which leads a proportion of the air conveyed by the blower 8 to the exterior.
  • the drier is therefore an air circulating drier to which a certain proportion of fresh air is fed and from which a corresponding quantity of moist air is discharged.
  • a slot 14 in the base of the housing 1 Through which slot completely dried film sheets can fall into a receiver 15. This is accessible through an opening 16 in a front wall of the houing 1, so that the film sheets can be removed at that point.
  • a blower tube is seen to have a cross-section of near trapezium shape, the parallel sides 6a, 6b of which, perpendicular to the path of the layer supports, are approximately twice as long as the smaller transverse dimension of the tube.
  • One narrow side 60! is inclined at about 45 with respect to the parallel surfaces and the other 60 is of cylindrical curvature. Resulting from the manufacturing method (extrusion), and to be preferred for improved guiding of the film sheets, all corners are rounded, particularly at the points facing towards the film sheet path.
  • the blower tubes are preferably made of aluminium, which can easily be given the required shape by the extrusion method.
  • the transport rollers need not be arranged opposite each other in pairs as shown, but alternately on the two sides of the path of the film sheet, A blower tube can then be arranged opposite a transport roller in each case.
  • the blower tubes can, instead, be positioned to direct the air stream in the direction of travel of the film sheet, so that drying takes place with the air flow and the film sheet moving in the same direction. This arrangement has a rather poorer drying eflect compared with the counterflow method, but results in better guiding of the leading edge of the film sheet.
  • Drier for photographic layer supports in sheet form, especially sheet film comprising a series of rollers for transporting said supports along a predetermined path, said rollers being arranged in spaced parallel relation along both sides of said path; and a series of blower tubes for directing air upon said supports, said tubes being disposed in spaced parallel relation to said rollers, one between each adjacent pair of such rollers; each of said tubes when viewed in cross-section having flattened side walls extending generally normally to the support path, an inside end wall adjacent said support path which is inclined relative to said path, and an outside end wall remote from said path extending between the remote ends of said flattened side walls to complete the tube, said inclined inside wall having a slit-like air passage extending lengthwise therein the axis of the passage being at an acute angle to said outer surface of said inclined wall whereby a current of air emerging from said passage flows parallel to said inclined wall and upon passing the limit of said wall generally parallel to the support path.
  • blower tubes are of generally trapezoid shaped cross section with the two parallel sides of the trapezoid being arranged perpendicular to the path of the layer supports, the side between said parallel sides remote from said path being of approximately cylindrical curvature and the side bet-ween said parallel sides adjacent said path being inclined thereto; said air passage being in the latter side at a point nearer to the shorter of the two parallel sides.
  • Drier according to claim 1 wherein said slit-like air passage extends at least over a distance equal to the corresponding dimension of the largest layer support to be dried in the drier.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Drying Of Solid Materials (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Advancing Webs (AREA)
US566691A 1965-07-20 1966-07-20 Drier for photographic layer supports in sheet form Expired - Lifetime US3438140A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3087665 1965-07-20
GB39816/65A GB1157281A (en) 1965-07-20 1965-07-20 Dryer for a Film Processing Machine

Publications (1)

Publication Number Publication Date
US3438140A true US3438140A (en) 1969-04-15

Family

ID=26260645

Family Applications (2)

Application Number Title Priority Date Filing Date
US566691A Expired - Lifetime US3438140A (en) 1965-07-20 1966-07-20 Drier for photographic layer supports in sheet form
US566690A Expired - Lifetime US3435539A (en) 1965-07-20 1966-07-20 Dryer for a film processing machine

Family Applications After (1)

Application Number Title Priority Date Filing Date
US566690A Expired - Lifetime US3435539A (en) 1965-07-20 1966-07-20 Dryer for a film processing machine

Country Status (6)

Country Link
US (2) US3438140A (enrdf_load_stackoverflow)
BE (1) BE684359A (enrdf_load_stackoverflow)
DE (1) DE1497394A1 (enrdf_load_stackoverflow)
FR (1) FR1560219A (enrdf_load_stackoverflow)
GB (1) GB1157281A (enrdf_load_stackoverflow)
NL (1) NL6610172A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135312A (en) * 1977-04-21 1979-01-23 Hope Henry F Film dryer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS518226B1 (enrdf_load_stackoverflow) * 1970-12-29 1976-03-15
JPS513427B1 (enrdf_load_stackoverflow) * 1970-12-30 1976-02-03
DE3313876A1 (de) * 1983-04-16 1984-10-18 Agfa-Gevaert Ag, 5090 Leverkusen Vorrichtung zum trocknen von fotografischen schichttraegern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE218770C (enrdf_load_stackoverflow) *
DE612366C (de) * 1933-03-31 1935-04-18 Hans H Brendel Belueftungsvorrichtung fuer Trockner mit Umluftstroemung
US2229921A (en) * 1938-04-23 1941-01-28 Warren S D Co Method of and apparatus for coating sheet material
US3147090A (en) * 1957-09-17 1964-09-01 Eastman Kodak Co Dryer for a film processing machine
US3316657A (en) * 1965-10-23 1967-05-02 Huyck Corp Air deflector utilizing coanda effect

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318017A (en) * 1967-05-09 Heat treating method and apparatus
US1214712A (en) * 1916-03-06 1917-02-06 Charles E Pope Paper-machine.
US2767485A (en) * 1953-12-09 1956-10-23 Coe Mfg Co Veneer dryer
US3324571A (en) * 1964-07-29 1967-06-13 Moore Dry Kiln Company Dryer for sheet material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE218770C (enrdf_load_stackoverflow) *
DE612366C (de) * 1933-03-31 1935-04-18 Hans H Brendel Belueftungsvorrichtung fuer Trockner mit Umluftstroemung
US2229921A (en) * 1938-04-23 1941-01-28 Warren S D Co Method of and apparatus for coating sheet material
US3147090A (en) * 1957-09-17 1964-09-01 Eastman Kodak Co Dryer for a film processing machine
US3316657A (en) * 1965-10-23 1967-05-02 Huyck Corp Air deflector utilizing coanda effect

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135312A (en) * 1977-04-21 1979-01-23 Hope Henry F Film dryer

Also Published As

Publication number Publication date
BE684359A (enrdf_load_stackoverflow) 1967-01-20
DE1497394A1 (de) 1969-05-29
NL6610172A (enrdf_load_stackoverflow) 1966-12-27
GB1157281A (en) 1969-07-02
US3435539A (en) 1969-04-01
FR1560219A (enrdf_load_stackoverflow) 1969-03-21

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