EP0100681A2 - Antriebsriemen aus Silikongummi und Wärmeentwicklungsgerät für ein photographisches Medium das solch einen Riemen benutzt - Google Patents

Antriebsriemen aus Silikongummi und Wärmeentwicklungsgerät für ein photographisches Medium das solch einen Riemen benutzt Download PDF

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Publication number
EP0100681A2
EP0100681A2 EP19830304461 EP83304461A EP0100681A2 EP 0100681 A2 EP0100681 A2 EP 0100681A2 EP 19830304461 EP19830304461 EP 19830304461 EP 83304461 A EP83304461 A EP 83304461A EP 0100681 A2 EP0100681 A2 EP 0100681A2
Authority
EP
European Patent Office
Prior art keywords
drive belt
belt
section
drive
rubber layer
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.)
Withdrawn
Application number
EP19830304461
Other languages
English (en)
French (fr)
Inventor
Richard L. Duggan
Bruce H. Ostermeier
William W. Gellatly
Harold J. Wacek
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.)
Tektronix Inc
Original Assignee
Tektronix Inc
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 Tektronix Inc filed Critical Tektronix Inc
Publication of EP0100681A2 publication Critical patent/EP0100681A2/de
Withdrawn legal-status Critical Current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
    • G03D13/00—Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
    • G03D13/002—Heat development apparatus, e.g. Kalvar

Definitions

  • the subject matter of the present invention pertains to an improved silicone rubber drive belt for use in an apparatus for thermal development of a photographic medium using said drive belt.
  • Various apparatus is used for producing a hard copy reproduction of an image displayed on a cathode-ray tube (CRT).
  • CRT cathode-ray tube
  • One such apparatus utilizes a fiber-optic CRT to produce said hard copy reproduction through thermal development of a special photographic medium.
  • a processor assembly drives said photographic medium in a direction transverse to the longitudinal axis of the fiber-optic CRT. As the photographic medium moves in said direction across the outer faceplate of the fiber-optic CRT, the line of image information on said fiber-optic CRT is transferred to the photographic medium adjacent thereto.
  • said processor assembly drives said photographic medium in the direction transverse to the longitudinal axis of the fiber-optic CRT, each line of image information displayed on the fiber-optic CRT is transferred to the photographic medium.
  • the processor assembly includes a drive belt stretched to extend between two drive rollers and an idler roller. One surface of the drive belt faces one surface of a heater platen. Disposed between the drive belt and the heater platen is the photographic medium, the drive belt moving the photographic medium in the direction transverse to the longitudinal axis of the fiber-optic CRT.
  • the known processor assembly experiences a very short operating life, due to elongation of the drive belt.
  • the photographic medium exudes a chemical exudate, the exudate being absorbed into the drive belt causing the drive belt to swell, to soften and to stick to portions of the heater platen.
  • the object of the present invention is accomplished by impregnating the drive belt with a filler element, such as carbon black for optimizing the
  • FIG. 1 illustrates one apparatus for producing a hard copy reproduction of an image displayed on a fiber-optic CRT.
  • the apparatus 10 includes a storage canister 10A for storing the photographic medium therein, such as photographic paper 10A1.
  • photographic paper 10A1 When the photographic paper is removed from the canister 10A, it is disposed in contact with and adjacent to a first idler roller 10B.
  • the photographic paper 10A1 moves in contact the first idler roller 10B.
  • the photographic paper 10A1 is disposed between and in contact with a foam pressure roller 10C and the outer faceplate of the fiber-optic CRT 10D.
  • the image displayed on the CRT is transferred to the photographic paper 10A1.
  • the paper 10A1 is then disposed between a pinch roller 10E and a first drive roller 10F.
  • the driver roller 10F aids in driving the belt in the direction transverse to the longitudinal axis of the fiber-optic CRT 10D.
  • the paper 10A1 then moves in said direction beyond a paper cutter stationary blade 10G and a paper cutter rotary blade 10H.
  • the photographic paper then moves into the processor assembly 10I.
  • the processor assembly 10I includes a heater platen C, two drive rollers D and E, a second idler roller F, and the drive belt A (processor belt) stretched to extend between the second idler roller F, the drive roller E, on one end, and the drive roller D on the other end.
  • the photographic paper 10A1 is disposed between the drive belt A and the heater platen C, the drive belt A driving the photographic paper in said direction indicated by arrow 10I1 transverse to the longitudinal axis of the fiber-optic CRT 10D.
  • the photographic paper 10A1 then comes into contact with a processor rear paper guide 10J which guides the photographic . paper 10A1 into a position disposed between the two belts 10K1 and 10K2 of conveyor 10K.
  • the drive rollers D and E in addition to the drive roller 10F, drive the photographic paper 10A1 from its storage canister 10A, past the fiber-optic CRT 10D, through the processor 10I, to the conveyor 10K which moves it to the front panel 10L, where it exits from the apparatus.
  • the belt A would stretch and elongate, thereby reducing the tension of the belt between the drive rollers D and E. In addition, the belt would soften, swell, and become very sticky.
  • the belt A stretches due to an inherent lack of stiffness qualities associated therewith. The belt becomes soft, swells, and is sticky as a result of a chemical exudate exuded from the photographic paper 10A1 when the paper comes into contact with the drive belt A.
  • the photographic paper 10A exudes stearic acid and water, major constituents of the chemical exudate referred to hereinabove.
  • the stearic acid and water exudate produces the softness qualities of the belt and also produces the stickiness qualities associated with the surface of the belt which contacts the photographic paper and the heater platen.
  • the new drive belt A according to the present invention is illustrated.
  • the drive belt A comprises a first section A1, the first section being a cured silicone rubber layer impregnated with 26-32 parts by weight of a filler element, such as carbon black.
  • the filler element must be resistant to the chemical exudate (stearic acid and water) exuded from the photographic paper 10A1 and it must produce a stiffness or hardness quality in the cured silicone rubber layer.
  • the filler element must be electrically conductive.
  • the new drive belt A exhibits a stiffness characteristic.
  • the hardness of the cured silicone rubber layer constituting section Al is increased (relative to the prior art drive belt) to 60 points shore A or greater as a result of said impregnation. This reduces the propensity of the drive belt A to stretch. As a result of said impregnation, the capacity of the belt to absorb the chemical exudate exuded from the photographic paper 10A1 is reduced. This reduces the propensity of the belt to soften and swell.
  • the new drive belt A further comprises a second section A2, the second section being a hard coating disposed in contact with the first section A1. The hard coating must have a characteristic whereby the friction between the new belt A and the heater platen C or between the new belt A and the photographic paper 10A1 is reduced.
  • This reduction in friction reduces the probability that the drive belt A will stick to the heater platen C and reduces the power required to drive the drive belt A via the drive rollers D and E.
  • the image quality of the image transferred to the photographic paper 10A1, by the fiber-optic CRT 10D is improved.
  • a hard coating which may be used for section A2 shown in FIG. 2 is Dow Corning 1-2577 conformal silicone coating.
  • the hard coating comprising the second section A2 of the new belt A should be approximately 1/2 to 1 mil in thickness.
  • the new drive belt A comprises the first section Al, the second section A2 disposed over said first section, the first and second sections A1 and A2 of the new drive belt A being described in the paragraphs hereinabove with reference to FIG. 2 of the drawings.
  • a third section A3 is disposed over and is in contact with said second section A2, the third section A3 being a lubricating film for still further lowering the friction between the drive belt A and the heater platen C or between the drive beltt A and the photographic paper medium 10A1.
  • Molybdenum di sulphide powder is one example of the lubricating film which may be used as the third section A3.
  • either the hard coating characterized by the second section A2 or the lubricating film characterized by the third section A3 may be disposed over the first section A1.
  • the second and third sections A2 and A3 may be used together as two separate layers, or mixed together as one layer, and disposed over and in contact with the first section A1.
  • the choice of the use of either section A2, or section A3, or both sections A2 and A3 to be disposed over the first section A1 depends upon the frictional characteristics of the drive belt path.
  • the new drive belt A of the present invention may comprise the first section Al in combination with the second section A2 or the combination of the first and second sections Al and A2, further in combination with the third section A3.
  • the former combination the first and second sections Al ard A2
  • the latter combination the combined sections A1, A2, and A3 must be utilized. Consistent test results are achieved in demonstrating this greater operating life when the latter combination comprises the new drive belt A.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Handling Of Sheets (AREA)
  • Photographic Developing Apparatuses (AREA)
EP19830304461 1982-08-02 1983-08-02 Antriebsriemen aus Silikongummi und Wärmeentwicklungsgerät für ein photographisches Medium das solch einen Riemen benutzt Withdrawn EP0100681A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40397082A 1982-08-02 1982-08-02
US403970 1982-08-02

Publications (1)

Publication Number Publication Date
EP0100681A2 true EP0100681A2 (de) 1984-02-15

Family

ID=23597602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830304461 Withdrawn EP0100681A2 (de) 1982-08-02 1983-08-02 Antriebsriemen aus Silikongummi und Wärmeentwicklungsgerät für ein photographisches Medium das solch einen Riemen benutzt

Country Status (2)

Country Link
EP (1) EP0100681A2 (de)
JP (1) JPS5962853A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62280741A (ja) * 1986-05-29 1987-12-05 Fuji Photo Film Co Ltd 画像記録装置
JPS63155144A (ja) * 1986-12-19 1988-06-28 Fuji Photo Film Co Ltd 画像記録用材料の乾燥方法
JPS63228154A (ja) * 1987-03-17 1988-09-22 Fuji Photo Film Co Ltd 加熱現像装置
JPH0262433U (de) * 1988-10-26 1990-05-10

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5878904A (ja) * 1981-11-05 1983-05-12 Sumitomo Rubber Ind Ltd 搬送用エンドレスゴムベルト

Also Published As

Publication number Publication date
JPS5962853A (ja) 1984-04-10

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19860303

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GELLATLY, WILLIAM W.

Inventor name: WACEK, HAROLD J.

Inventor name: DUGGAN, RICHARD L.

Inventor name: OSTERMEIER, BRUCE H.