EP0117620A1 - Appareil de développement thermique pour le développement thermique d'un support photographique - Google Patents

Appareil de développement thermique pour le développement thermique d'un support photographique Download PDF

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Publication number
EP0117620A1
EP0117620A1 EP84300420A EP84300420A EP0117620A1 EP 0117620 A1 EP0117620 A1 EP 0117620A1 EP 84300420 A EP84300420 A EP 84300420A EP 84300420 A EP84300420 A EP 84300420A EP 0117620 A1 EP0117620 A1 EP 0117620A1
Authority
EP
European Patent Office
Prior art keywords
drive
drive belt
belt
elastic
thermal development
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Withdrawn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
EP84300420A
Other languages
German (de)
English (en)
Inventor
Donald I. Loofbourow
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 EP0117620A1 publication Critical patent/EP0117620A1/fr
Withdrawn legal-status Critical Current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 thermal development apparatus for thermal development of a photographic medium passing therethrough.
  • 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 and a thermal development apparatus to pro - prise said hard copy reproduction through thermal development of a special photgraphic medium.
  • the thermal development apparatus includes a processor assembly for driving 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 an outer faceplate of the fiber-optic CRT, a line of image information on said fiber-optic CRT is transferred to the photographic medium disposed adjacent thereto. Eventually, as the processor assembly drives the photographic medium in the above- mentioned direction, 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 one or more idler rollers.
  • 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 heater platen heats the photographic medium thereby producing the hard copy reproduction of the image.
  • a problem associated with the processor assembly has been encountered.
  • the processor assembly has been experiencing 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 processor assembly is modified by spring loading a platen of the processor assembly against the photographic medium disposed therein or against the non-elastic drive belt of said processor assembly if no photographic medium is disposed therein.
  • the spring loaded platen forcedly urges the photographic medium to contact the non-elastic drive belt.
  • a first drive roller is knurled at an outer circumferential surface thereof, the knurled outer circumferential surface being adapted to contact an inner surface of said non-elastic drive belt.
  • the knurled outer surface of said first drive roller grips the non-elastic drive belt and drives the non-elastic drive belt in a desired direction.
  • a second drive roller is not knurled at an outer surface thereof, since this drive roller is disposed at a receiving end of said processor assembly for receiving the drive belt and the photographic medium passing therethrough.
  • FIG. 1 illustrates one apparatus for producing a hard copy reproduction of an image displayed on a fiberoptic CRT.
  • the apparatus 10 includes a storage canister 10A for storing the photographic medium therein, such as photographic paper 10Al.
  • photographic paper 10Al 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 contacts the first idler roller 10B and moves circumferentially therewith.
  • the photographic paper 10A1 is then disposed between and in contact with a foam pressure roller 10C and an outer faceplate of a fiber- optic CRT 10D. As the photographic paper 10A1 moves across the outer faceplate of the fiber-optic CRT, 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 a 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) extending 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 10AI then contacts a processor rear paper guide 10J which guides the photographic paper 10A1 into a position intermediate 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, and to the conveyor 10K, which moves the paper 10A1 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 becomes sticky as a result of a chemical exudate exuded from the photographic paper 10Al when the paper contacts 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 is responsible for the softness qualities and the stickiness qualities associated with a surface of the belt which contacts the photographic paper and the heater platen.
  • the new, non-elastic drive belt utilized as the drive belt in the processor assembly of the appartus of figure 1, comprises a woven, endless, Nomex fiber within a non-marking silicone rubber saturant stock.
  • the inside of said non-elastic belt comprises a fine- fabric impression on a silicone rubber saturant.
  • the outside of said non-elastic belt, the side which faces the heater placen C, is ground thereby exposing the fabric.
  • the preferred dimensions of the non-elastic drive belt are: length - 26" ⁇ .125 "@ 10 lbs tension with maximum variation of + .032" edge to edge within any one belt; width - 8.875" ⁇ .032"; thickness - .021" + .004" with maximum variation of .004" within any one belt.
  • a non-elastic drive belt sufficient to perform the function of the non-elastic drive belt referred to hereinabove, may be purchased from ALBANY International, Precision Components Division, 150 Industrial Park Rd., Middletown Connecticut.
  • the non-elastic drive belt may be identified by part number 214-3455-00, or, alternatively, by ALBANY part number E-1505-HG.
  • an apparatus 20 for producing a hard-copy reproduction of an image is illustrated, the apparatus utilizing the non-elastic drive belt described hereinabove.
  • the apparatus 20 includes a first drive roller 20A, a second drive roller 20B and two idler rollers 20C and 20D.
  • a non-elastic drive belt 20E, of the type described hereinabove, is disposed tightly around the drive rollers 20A and 20B and the idler rollers 20C and 20D.
  • a heater platen 20F is disposed in contact with the non-elastic drive belt 20E.
  • a spring 20G urges the platen 20F into tight contact with the non-elastic drive belt 20E.
  • An outer circumferential surface of the first drive roller 20A is disposed in contact with the non-elastic drive belt 20E.
  • the outer circumferential surface of drive roller 20A is knurled in order to provide an increased frictional contact between drive roller 20A and the non-elastic drive belt 20E.
  • An outer circumferential surface of the second drive roller 20B is smooth.
  • the belt 20E of the type described hereinabove, is allowed to slip on the smooth outer surface thereof.
  • the processor assembly itself should be modified to accomodate the non-elastic belt.
  • the modification of the processor assembly should inherently involve the two alternatives indicated hereinabove, that is, the alternative method of placing drive belt 20E under tension, and the alternative method of driving the drive belt 20E.
  • the spring 20G urges the heater platen 20F into tight contact with the drive belt 20E.
  • the drive belt 20E is placed under tension.
  • the belt 20E is non-elastic, it is necessary to provide the alternative method of driving the drive belt 20E. Consequently, the first drive roller 20A is knurled at the outer circumferential surface thereof. The knurled outer surface causes an increased frictional contact to exist between drive roller 20A and drive belt 20E.
  • the surface of belt 20E, contacting the heater platen 20F is ground, thereby exposing the internal fabric. Therefore, a reduced frictional contact exists between the side of the non-elastic belt which contacts the heater platen, and said heater platen.
  • the drive roller 20A more easily drives said belt 20E through the processor assembly and, in particular, past the heater platen 20F.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Handling Of Sheets (AREA)
EP84300420A 1983-01-31 1984-01-24 Appareil de développement thermique pour le développement thermique d'un support photographique Withdrawn EP0117620A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46264883A 1983-01-31 1983-01-31
US462648 1995-06-05

Publications (1)

Publication Number Publication Date
EP0117620A1 true EP0117620A1 (fr) 1984-09-05

Family

ID=23837234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84300420A Withdrawn EP0117620A1 (fr) 1983-01-31 1984-01-24 Appareil de développement thermique pour le développement thermique d'un support photographique

Country Status (2)

Country Link
EP (1) EP0117620A1 (fr)
JP (1) JPS59142580A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998056698A1 (fr) * 1997-06-12 1998-12-17 Avery Dennison Corporation Dispositif convoyeur pour articles plats, et courroie plate y relative

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR976363A (fr) * 1948-01-02 1951-03-16 Goodrich Co B F Perfectionnements apportés aux dispositifs pour le développement à sec d'images ou tirages photographiques
GB919125A (en) * 1958-04-24 1963-02-20 Ozalid Co Ltd Improvements in and relating to diazotype photo-copying apparatus
US3294003A (en) * 1964-03-12 1966-12-27 Bell & Howell Co Developer tank guide wall structure
US3749491A (en) * 1972-02-07 1973-07-31 Stromberg Datagraphix Inc Microfiche duplicator
FR2291865A1 (fr) * 1974-11-22 1976-06-18 Mannino Ugo Machine heliographique a developpement thermique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4416309Y1 (fr) * 1966-01-08 1969-07-14
JPS5021260A (fr) * 1973-06-27 1975-03-06
JPS5527335A (en) * 1978-08-18 1980-02-27 Teijin Ltd Polyester resin composition

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR976363A (fr) * 1948-01-02 1951-03-16 Goodrich Co B F Perfectionnements apportés aux dispositifs pour le développement à sec d'images ou tirages photographiques
GB919125A (en) * 1958-04-24 1963-02-20 Ozalid Co Ltd Improvements in and relating to diazotype photo-copying apparatus
US3294003A (en) * 1964-03-12 1966-12-27 Bell & Howell Co Developer tank guide wall structure
US3749491A (en) * 1972-02-07 1973-07-31 Stromberg Datagraphix Inc Microfiche duplicator
FR2291865A1 (fr) * 1974-11-22 1976-06-18 Mannino Ugo Machine heliographique a developpement thermique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELECTRO-OPTICAL SYSTEMS DESIGN, vol. 12, no. 7, July 1980, pages 37-44, Milton S. Kivez Publications, Chicago, US *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998056698A1 (fr) * 1997-06-12 1998-12-17 Avery Dennison Corporation Dispositif convoyeur pour articles plats, et courroie plate y relative

Also Published As

Publication number Publication date
JPS59142580A (ja) 1984-08-15

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Inventor name: LOOFBOUROW, DONALD I.