EP0383484A1 - Trocknung - Google Patents
Trocknung Download PDFInfo
- Publication number
- EP0383484A1 EP0383484A1 EP90301323A EP90301323A EP0383484A1 EP 0383484 A1 EP0383484 A1 EP 0383484A1 EP 90301323 A EP90301323 A EP 90301323A EP 90301323 A EP90301323 A EP 90301323A EP 0383484 A1 EP0383484 A1 EP 0383484A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- sensor
- drying
- amount
- moisture
- 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
Links
Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
- F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
-
- 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
- the present invention relates to the drying of materials, particularly, but not exclusively, sheet or web materials such as photographic paper and film.
- a number of methods for drying photographic paper for example that shown in British Patent Specification GB-A-1561897. This method involves directing radiant heat only on to the non-image-bearing side of the photographic paper as it travels through a drying chamber and simultaneously causing a stream of air to flow over the image-bearing side of the paper.
- a method of drying a material comprising the steps of applying heat to at least one side of the material; and sensing the amount of moisture remaining in the material after it has been heated so as to determine whether any further drying is required.
- apparatus for drying a material comprising heater means for applying heat to at least one side of the material, characterised in that at least one sensor is provided for measuring the amount of moisture remaining in the material after it has received heat from the heater means so as to determine whether any further drying is required.
- the heater means comprises at least two heating stages, at least one sensor being positioned between adjacent stages.
- Each sensor may be connected to control means which controls power supplied to the heater means.
- the apparatus may further comprise blower means for blowing air on to at least one side of the material, and each sensor may be also connected to the control means in order to control the power supplied to the blower means.
- Measurement of the moisture remaining in the material can be achieved by any convenient method.
- at least one of the sensors may be a capacitance sensor.
- contact conductive resistance sensors may be used.
- Figure 1 illustrates drying apparatus in which a sheet or web of photographic paper 2 is being dried.
- the paper 2 passes through the apparatus with its emulsion side uppermost.
- Infra-red heaters 4, 4′ are positioned below the path of travel of the photographic paper 2, and are arranged in two stages. These heaters 4, 4′ are used to heat the wet emulsion layer of the paper, by conduction, through the base on to which the emulsion layer is coated. A reflector 18 is positioned around each heater 4, 4′ so that most of the heat generated by the heater is directed upwards on to the base of the photographic paper 2.
- Squeegee rollers 8 are provided at the entry to the apparatus, the paper 2 entering the apparatus between these rollers.
- the rollers 8 remove surface water which then passes out through a drain outlet 10.
- Transport rollers 12 are provided at the exit from the apparatus. These rollers 12 direct the dried paper 2 on to further processing stages, for example, to cutting apparatus which cuts the paper into individual prints.
- the squeegee rollers 8 and transport rollers 12 are driven (by means not shown) so as to direct the paper 2 into and out of the drying apparatus.
- a sensor 14 is positioned halfway along the path which the paper 2 takes through the drying apparatus, that is between heater stages 4 and 4′.
- the sensor 14 senses the amount of moisture left in the paper 2 as it passes that sensor (after passing through heaters 4).
- the sensor 14 uses a proportional capacitance technique to determine the amount of moisture remaining in the paper.
- the power supplied to the heaters 4′ which follow sensor 14 is controlled so as to, in turn, control the amount of further drying that takes place.
- a fan 16 circulates air in the space 40 to provide a small quantity of cooling air for the sensor 14 and the backs of reflectors 18.
- Wire guides 20 are provided to ensure that the paper 2 is transported across the heaters 4, 4′ to the transport rollers 12.
- a sensor 22 is positioned after the transport rollers 12 so as to provide a final check on the amount of moisture in the paper 2 as it leaves the apparatus.
- FIG. 2 A circuit which may be used to control the apparatus of Figure 1 is shown in Figure 2.
- the circuit comprises a central logic controller 24 which has inputs 26 and 28 from the sensors 14 and 22 (not shown), and outputs 30, 32, 34 and 36 which are connected to the fans 6, fan 16, transport rollers 12 and heaters 4, 4′ respectively (also not shown).
- the present invention has the advantage that the power consumption is minimised and the danger of overheating the paper is avoided. Also, the amount of drying is controlled independently of the temperature or humidity of the air being used to dry the material.
- the present invention When the present invention is used in a dryer which operates with infra-red radiation and unheated air, it is very fast. In particular, a high level of power can be applied at the initial stage and then the need for any further drying determined as described above.
- the present invention can be used in processing machines to dry coated exposed and processed material. It can also be used in drying any web or material, for example in coating operations, or in drying chemical solids out of solutions or other materials.
- contact heating using a hot surface can also be employed where appropriate.
- the wire guides 20 in contact with the base of the paper could be heated directly.
- recycled hot air can also be employed.
- Capacitance sensing is the preferred arrangement, although contact conductive resistance sensing can also be used.
- the arrangement utilises heating the material from one side and blowing air from the other side
- any other suitable arrangement could be used as long as the material is heated from at least one side.
- both the heating and the blowing of air could be on the same side of the material.
- the material could be heated from more than one side.
- the air could be blown from more than one side.
- the paper can pass through two heating stages, it is emphasised that any suitable number of heating stages can be employed as desired.
- heating stages being provided by physically successive heaters, they could be provided by the paper being exposed to the same heaters more than once by recycling the paper through the same heaters.
- the arrangement described above has the added advantage that it can be used under any climatic conditions without requiring further adjustment. Naturally, adjustment will need to be made to accommodate materials having different physical characteristics.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8903064 | 1989-02-10 | ||
GB898903064A GB8903064D0 (en) | 1989-02-10 | 1989-02-10 | Drying |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0383484A1 true EP0383484A1 (de) | 1990-08-22 |
Family
ID=10651502
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90903027A Expired - Lifetime EP0458825B1 (de) | 1989-02-10 | 1990-02-08 | Trocknungsgerät |
EP90301323A Pending EP0383484A1 (de) | 1989-02-10 | 1990-02-08 | Trocknung |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90903027A Expired - Lifetime EP0458825B1 (de) | 1989-02-10 | 1990-02-08 | Trocknungsgerät |
Country Status (10)
Country | Link |
---|---|
EP (2) | EP0458825B1 (de) |
JP (1) | JP3107394B2 (de) |
KR (1) | KR920701867A (de) |
AT (1) | ATE117102T1 (de) |
AU (1) | AU5090390A (de) |
CA (1) | CA2046912A1 (de) |
DE (1) | DE69016011T2 (de) |
GB (1) | GB8903064D0 (de) |
MY (1) | MY106328A (de) |
WO (1) | WO1990009621A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992007222A2 (en) * | 1990-10-11 | 1992-04-30 | Management & Guidance Services Limited | Drying apparatus and method |
EP0508254A1 (de) * | 1991-04-12 | 1992-10-14 | Van Brandwijk Systems Programming B.V. | Verfahren und Vorrichtung zur Wärmebehandlung einer mit einer flüssigen oder pastenförmigen Zubereitung versehenen Warenbahn |
EP0557845A1 (de) * | 1992-02-27 | 1993-09-01 | Agfa-Gevaert AG | Verfahren und Vorrichtung zum Trocknen von band- oder blattförmigen, fotografischen Schichtträgern |
EP0581567A1 (de) * | 1992-07-31 | 1994-02-02 | Kodak Limited | Photographische Trocknungsvorrichtung unter Verwendung von Luftdruck zur Festhaltung des Filmes auf dem Förderer |
EP1906264A2 (de) * | 2006-09-27 | 2008-04-02 | Xerox Corporation | Medienaufbereitungsmodul |
CN112540506A (zh) * | 2020-11-03 | 2021-03-23 | 陈慧灵 | 一种胶片烘干放置箱 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2101944T3 (es) * | 1992-05-01 | 1997-07-16 | Hewlett Packard Co | Impresora termica de chorro de tinta con una cabeza de impresion que tiene energia calorifica variable para diferentes medios. |
US5296873A (en) * | 1992-05-01 | 1994-03-22 | Hewlett-Packard Company | Airflow system for thermal ink-jet printer |
ES2092222T3 (es) * | 1992-05-01 | 1996-11-16 | Hewlett Packard Co | Sistema soplante calentado en una impresora de chorro de tinta de color. |
US5479199A (en) * | 1992-05-01 | 1995-12-26 | Hewlett-Packard Company | Print area radiant heater for ink-jet printer |
US5406316A (en) * | 1992-05-01 | 1995-04-11 | Hewlett-Packard Company | Airflow system for ink-jet printer |
US5399039A (en) * | 1992-05-01 | 1995-03-21 | Hewlett-Packard Company | Ink-jet printer with precise print zone media control |
US5406321A (en) * | 1993-04-30 | 1995-04-11 | Hewlett-Packard Company | Paper preconditioning heater for ink-jet printer |
US5581289A (en) * | 1993-04-30 | 1996-12-03 | Hewlett-Packard Company | Multi-purpose paper path component for ink-jet printer |
US5461408A (en) * | 1993-04-30 | 1995-10-24 | Hewlett-Packard Company | Dual feed paper path for ink-jet printer |
JP3417605B2 (ja) * | 1993-07-20 | 2003-06-16 | 富士写真フイルム株式会社 | 感光材料乾燥制御方法及び装置 |
US5774141A (en) * | 1995-10-26 | 1998-06-30 | Hewlett-Packard Company | Carriage-mounted inkjet aerosol reduction system |
DE102014111807B4 (de) * | 2014-08-19 | 2019-08-22 | Wolfgang Balga | Vorrichtung und Verfahren zur Bearbeitung von Film |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1023002B (de) * | 1954-11-20 | 1958-01-23 | Mahlo Heinz Dr Ing | Verfahren und Vorrichtung zum Regeln von Trockenmaschinen, insbesondere Gewebetrocknern, auf konstanten Feuchtegehalt des auslaufenden Trockengutes |
US3864843A (en) * | 1972-03-14 | 1975-02-11 | Agfa Gevaert Ag | Apparatus for continuously measuring the surface temperature of moving webs |
US4142301A (en) * | 1976-10-20 | 1979-03-06 | Ciba-Geigy Ag | Method and apparatus for drying photographic material |
WO1988008949A1 (en) * | 1987-05-14 | 1988-11-17 | Imatran Voima Oy | Method and apparatus for drying planar material, e.g., veneer sheet |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5469689A (en) * | 1977-11-15 | 1979-06-04 | Mitsubishi Electric Corp | Mositure rate control system |
-
1989
- 1989-02-10 GB GB898903064A patent/GB8903064D0/en active Pending
-
1990
- 1990-02-08 MY MYPI90000207A patent/MY106328A/en unknown
- 1990-02-08 EP EP90903027A patent/EP0458825B1/de not_active Expired - Lifetime
- 1990-02-08 EP EP90301323A patent/EP0383484A1/de active Pending
- 1990-02-08 CA CA002046912A patent/CA2046912A1/en not_active Abandoned
- 1990-02-08 DE DE69016011T patent/DE69016011T2/de not_active Expired - Fee Related
- 1990-02-08 KR KR1019910700877A patent/KR920701867A/ko not_active Application Discontinuation
- 1990-02-08 AU AU50903/90A patent/AU5090390A/en not_active Abandoned
- 1990-02-08 JP JP02503191A patent/JP3107394B2/ja not_active Expired - Fee Related
- 1990-02-08 WO PCT/GB1990/000191 patent/WO1990009621A1/en active IP Right Grant
- 1990-02-08 AT AT90903027T patent/ATE117102T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1023002B (de) * | 1954-11-20 | 1958-01-23 | Mahlo Heinz Dr Ing | Verfahren und Vorrichtung zum Regeln von Trockenmaschinen, insbesondere Gewebetrocknern, auf konstanten Feuchtegehalt des auslaufenden Trockengutes |
US3864843A (en) * | 1972-03-14 | 1975-02-11 | Agfa Gevaert Ag | Apparatus for continuously measuring the surface temperature of moving webs |
US4142301A (en) * | 1976-10-20 | 1979-03-06 | Ciba-Geigy Ag | Method and apparatus for drying photographic material |
WO1988008949A1 (en) * | 1987-05-14 | 1988-11-17 | Imatran Voima Oy | Method and apparatus for drying planar material, e.g., veneer sheet |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN, vol. 3, no. 93 (M-68), 8th August 1979, page 138 M 68; & JP-A-54 69 689 (MITSUBISHI DENKI K.K.) 06-04-1979 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992007222A2 (en) * | 1990-10-11 | 1992-04-30 | Management & Guidance Services Limited | Drying apparatus and method |
WO1992007222A3 (en) * | 1990-10-11 | 1992-05-29 | Management & Guidance Services | Drying apparatus and method |
EP0508254A1 (de) * | 1991-04-12 | 1992-10-14 | Van Brandwijk Systems Programming B.V. | Verfahren und Vorrichtung zur Wärmebehandlung einer mit einer flüssigen oder pastenförmigen Zubereitung versehenen Warenbahn |
EP0557845A1 (de) * | 1992-02-27 | 1993-09-01 | Agfa-Gevaert AG | Verfahren und Vorrichtung zum Trocknen von band- oder blattförmigen, fotografischen Schichtträgern |
US5369894A (en) * | 1992-02-27 | 1994-12-06 | Agfa-Gevaert Aktiengesellschaft | Method of and apparatus for drying running webs of photographic material |
EP0581567A1 (de) * | 1992-07-31 | 1994-02-02 | Kodak Limited | Photographische Trocknungsvorrichtung unter Verwendung von Luftdruck zur Festhaltung des Filmes auf dem Förderer |
EP1906264A2 (de) * | 2006-09-27 | 2008-04-02 | Xerox Corporation | Medienaufbereitungsmodul |
EP1906264A3 (de) * | 2006-09-27 | 2012-08-01 | Xerox Corporation | Medienaufbereitungsmodul |
CN112540506A (zh) * | 2020-11-03 | 2021-03-23 | 陈慧灵 | 一种胶片烘干放置箱 |
CN112540506B (zh) * | 2020-11-03 | 2021-12-17 | 李晓光 | 一种胶片烘干放置箱 |
Also Published As
Publication number | Publication date |
---|---|
JPH04503244A (ja) | 1992-06-11 |
DE69016011D1 (de) | 1995-02-23 |
AU5090390A (en) | 1990-09-05 |
ATE117102T1 (de) | 1995-01-15 |
WO1990009621A1 (en) | 1990-08-23 |
CA2046912A1 (en) | 1990-08-11 |
KR920701867A (ko) | 1992-08-12 |
DE69016011T2 (de) | 1995-08-10 |
GB8903064D0 (en) | 1989-03-30 |
MY106328A (en) | 1995-05-30 |
EP0458825B1 (de) | 1995-01-11 |
JP3107394B2 (ja) | 2000-11-06 |
EP0458825A1 (de) | 1991-12-04 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): GR |
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17P | Request for examination filed |
Effective date: 19910121 |
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RBV | Designated contracting states (corrected) |
Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
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RBV | Designated contracting states (corrected) |
Designated state(s): GR |
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RBV | Designated contracting states (corrected) | ||
XX | Miscellaneous (additional remarks) |
Free format text: VERFAHREN ABGESCHLOSSEN INFOLGE VERBINDUNG MIT 90903027.2/0458825 (EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) VOM 24.03.92. |
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REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |