EP0362762A2 - Verfahren und Vorrichtung zum Schutz von photographischen Negativen - Google Patents

Verfahren und Vorrichtung zum Schutz von photographischen Negativen Download PDF

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Publication number
EP0362762A2
EP0362762A2 EP89118222A EP89118222A EP0362762A2 EP 0362762 A2 EP0362762 A2 EP 0362762A2 EP 89118222 A EP89118222 A EP 89118222A EP 89118222 A EP89118222 A EP 89118222A EP 0362762 A2 EP0362762 A2 EP 0362762A2
Authority
EP
European Patent Office
Prior art keywords
negative
rollers
machine
drive
films
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Withdrawn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
EP89118222A
Other languages
English (en)
French (fr)
Other versions
EP0362762A3 (de
Inventor
Roberto Signoretto
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.)
Systel International SpA
Original Assignee
Systel International SpA
Photo Engineering International SRL
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 Systel International SpA, Photo Engineering International SRL filed Critical Systel International SpA
Publication of EP0362762A2 publication Critical patent/EP0362762A2/de
Publication of EP0362762A3 publication Critical patent/EP0362762A3/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Withdrawn legal-status Critical Current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
    • G03D15/00—Apparatus for treating processed material
    • G03D15/10—Mounting, e.g. of processed material in a frame

Definitions

  • This invention relates to a method for protecting photographic negatives, and a machine for implementing the method.
  • This method has however the drawback of completely covering the longitudinal edges of the negative, and consequently masking the notches provided along it for controlling the operation of the cutter.
  • the problem is solved according to the invention by a method for protecting photographic negatives, characterised in that before cutting the negative into pieces, there is applied to each of its surfaces a transparent film having a height less than the height of the negative by an extent sufficient to leave the reference notches provided in the edges of said negative uncovered.
  • the method for protecting photographic negatives provides for the use of a machine comprising essentially a pair of rollers 1, 1′ supporting reels of transparent plastic material strip 2, 2′, and a roller 3 supporting the reel of photographic negatives 4 to be protected.
  • the height of the strip 2, 2′ is slightly less than the height of the negative 4, so that when the former is applied to the latter it does not cover the reference notches 13 provided on it.
  • a plurality of tensioning rollers 5 and deviator rollers 6 feed the strips 2, 2′ and the negative 4 to a covering unit comprising two heating tracks 7 and two rubber presser rollers 8, both located on opposite sides of the plane along which the negative 4 advances.
  • Each rubber roller 8 is mounted on a corresponding mobile arm 9, and the two arms are provided with conventional members (not shown on the drawings) for opening them simultaneously, ie for rotating them in opposite directions to cause them to simultaneously withdraw from or approach the plane along which the negative 4 advances.
  • a gear wheel 10 is idly mounted on the rotation shaft of one of the two arms 9 and is constantly engaged with the gear wheel 11 of an electric motor (not shown).
  • the gear wheel 10 is also engaged with a gear wheel 12 which is rigid with the corresponding roller 8 and engages with the gear wheel of the adjacent roller 8 when the two rollers 8 are in their position of maximum mutual approach.
  • the method according to the invention is as follows: the reels of strip 2, 2′ are unwound from the rollers 1, 1′. pass about the deviator rollers 6 and tensioning rollers 5, then pass along the heating tracks 7 and between the presser rollers, between which the negative 4 to protect also passes.
  • each strip 2, 2′ softens so that when it passes between the rollers 8 it becomes secured to the other strip 2, 2′ by thermowelding through the drive perforations 14 of the negatives 4.
  • the negative 4 On emerging from the rollers 8 the negative 4 is covered on both its surfaces with the strips 2, 2′, which however leave the notches 13 free for use by a conventional feeler controlling the operation of the cutter 15 which cuts it into pieces of convenient length for feeding it to conventional automatic packaging equipment.
  • the strip 2, 2′ is provided in proximity to its edges with two thin bands 16 of adhesive.
  • the bands 16 are located at a distance apart equal to the distance between the two rows of perforations 14 in the negative if this latter is provided with such perforations, and in any event at a distance apart which is clear of the photographic images themselves so as not to damage them. In the former case the connection is even more secure because of the direct bonding between the two protective films through the drive perforations 14.
  • the mothod for protective photographic negatives has numerous advantages, including: - a high working rate because of its continuous operation, - the fact that the notches in the negative can still be used for automatically operating the cutter.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
EP19890118222 1988-10-05 1989-10-02 Verfahren und Vorrichtung zum Schutz von photographischen Negativen Withdrawn EP0362762A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8884137A IT1225999B (it) 1988-10-05 1988-10-05 Metodo per proteggere negativi fotografici e macchina per attuareil metodo
IT8413788 1988-10-05

Publications (2)

Publication Number Publication Date
EP0362762A2 true EP0362762A2 (de) 1990-04-11
EP0362762A3 EP0362762A3 (de) 1991-01-16

Family

ID=11324610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890118222 Withdrawn EP0362762A3 (de) 1988-10-05 1989-10-02 Verfahren und Vorrichtung zum Schutz von photographischen Negativen

Country Status (2)

Country Link
EP (1) EP0362762A3 (de)
IT (1) IT1225999B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374480A3 (de) * 1988-12-22 1991-01-30 Qualex, Inc. Filmstreifenschutzverfahren und -erzeugnis
US5354379A (en) * 1993-02-08 1994-10-11 Minnesota Mining And Manufacturing Company Apparatus for applying a protective coating to a film strip

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2162793A1 (de) * 1971-12-17 1973-06-28 Agfa Gevaert Ag Verfahren und vorrichtung zum festlegen eines zumindest von einer transparenten folie beidseitig abgedeckten diapositivs bezueglich der folie
DE2205197A1 (de) * 1972-02-04 1973-08-09 Agfa Gevaert Ag Verfahren und vorrichtung zur abdekkung von mit rahmen zu versehenden diapositiven mit einer transparenten folie
DE3115288A1 (de) * 1981-04-15 1982-11-04 Geimuplast Peter Mundt Gmbh & Co Kg, 8105 Farchant Folie und verfahren fuer filmschutz
DE3629923C2 (de) * 1986-09-03 1996-02-29 Johannes Honerkamp Schutzhülle für vorzugsweise mit jeweils einem Nachbestellstreifen versehene Negativ- oder Filmabschnitte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374480A3 (de) * 1988-12-22 1991-01-30 Qualex, Inc. Filmstreifenschutzverfahren und -erzeugnis
US5354379A (en) * 1993-02-08 1994-10-11 Minnesota Mining And Manufacturing Company Apparatus for applying a protective coating to a film strip

Also Published As

Publication number Publication date
EP0362762A3 (de) 1991-01-16
IT1225999B (it) 1990-12-10
IT8884137A0 (it) 1988-10-05

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