Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
  • G03B17/00—Details of cameras or camera bodies; Accessories therefor
  • G03B17/26—Holders for containing light sensitive material and adapted to be inserted within the camera
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
  • G03C1/765—Photosensitive materials characterised by the base or auxiliary layers characterised by the shape of the base, e.g. arrangement of perforations, jags

Definitions

• the present invention relates to a method for the manufacture of a circular film unit for use with cameras.
• U.S. Patent 4,212,673, issued July 15, 1980 discloses a film unit comprising a circular film disk having metering notches around its periphery and a core in a central opening. The borders of image areas of the disk are preexposed.
• Handling of loose film disks in a continuous process is undesirable for several reasons, including the risk of damage to the image area. It is the object of the invention to provide a method of manufacture of a film unit of the type described, which method provides accurate alignment between such preexposed borders and metering notches in a continuous, high production run process without the risk of damage to the image area associated with handling of loose film disks.
• This object is accomplished by a method which includes advancing a web of unexposed photographic material along a path and, first, exposing image area borders in an annular locus on said web and cutting the web to form a plurality of perforations along a circular locus and a central opening inside the circular locus, both openings and perforations being accurately spaced relative to the image area borders; second, mounting the core in the central opening; and third, severing the web along
• Fig. 1 is a perspective view of a film unit to be manufactured in accordance with the invention
• Fig. 2 is a sectional view of the film unit of Fig. 1;
• Fig. 3 is a schematic view of a portion of an apparatus for carrying out the present invention
• Figs. 4-7 are detailed views of portions of the apparatus shown in Fig. 3
• several features have been shown in schematic form. These and many other features for use therewith are well known, and the present description is directed in particular to elements forming part of or cooperating more directly with manufacturing and assembling apparatus.
• a film unit 1 Referring to Figs. 1 and 2, a film unit 1
• OMP includes a film disk 2 mounted on a central core 4 and attached to the core by a sonically welded ring 6.
• Film unit 1 has a plurality of metering notches 24 located on the periphery of film disc 2 and a plurality of image areas 28 which are defined by exposed (but undeveloped) borders and located annularly around the disk.
• Fig. 3 shows a series of operations on a web of light sensitive film during the manufacture of film units such as shown in Fig. 1.
• a roll 10 of photographic film stock 12 is supplied to the film unit manufacturing apparatus.
• the film stock end is threaded through a tension looper roll 14 and a servomotor driven vacuum pacer drum 16.
• a set of servomotor driven pinch rollers 18 and 20 interact with pacer drum 16 to position the film web along its path.
• a work station 22 is provided to cut perforations 27 along a circular locas as well as an opening 26 (Fig. 4) in the center of the locus of perforations 27 to receive core 4.
• a work station 64 is provided to expose the borders. Work station 64 is shown prior to work station 22, but workstations
• central core 4 is held to film disc 2 by a ring 6 ultrasonically bonded to the core.
• This portion of the assembly operation is performed at a work station 34 shown generally in Fig. 3 and in more detail in Figs. 5 and 6.
• a plurality of rings 6 are supplied from a vibratory bowl, not shown, and are conveyed as a train of parts into a supply track to be picked up and held by vacuum in the tip of an ultrasonic horn assembly 36.
• a plurality of cores 4 are supplied by a vibratory bowl also and are conveyed as a train into line with ultrasonic horn assembly 36 and its anvil assembly 38.
• the anvil assembly is raised by a crank arm 40, and the ultrasonic horn assembly is lowered by a similar crank arm 42 to insert a core 4 into punched central opening 26 in web 12, lower a ring ,6 into contact with the core, and ultrasonically seal the ring to the core.
• This operation is schematically illustrated in Fig. 6.
• a work station 44 shown in Figs. 3 and 7, includes a crank-driven die set operated by an hydraulic cylinder, not shown, which turns shaft 46 below film web 12 to raise and lower a punch.
• the punch which is round, cooperates with a round die 48 to separate the finished film unit from web 12 along the locus of previously punched perforations 27.
• the accuracy of this operation is not as critical as the arcuate location of the perforations with respect to the image areas. However, it has been found that if the same basic mechanism is used to control alignment -5-
• the relative location of notches 24 and picture areas 28 is more precise if perforations 27 are cut at work stations 22 than if they are cut at work station 44.
• alignment for all these stations may be controlled by reference holes cut in the web at or upstream of the first of these stations.
• reference holes cut in the web at or upstream of the first of these stations See Research Disclosre, No. 20228, page 95, published February 1981 by Industrial Opportunities Ltd. of the United Kingdom.
• the web passes over an idler roller 50, through pinch rollers 18 and 20 and into a waste bin, not shown.
• the film units are punched from web 12 they are picked up by one of a plurality of rotatable vacuum heads 52 which are extendably mounted on a transfer rotor 54. From this point, further handling of the film unit is by contacting the core.
• the vacuum heads transport the film units to cleaning apparatus and assembly machinery for completion of photographic film cartridges.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Photographic Developing Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=22749739

Family Applications (1)

Country Status (3)

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Family Cites Families (11)

• 1981
  • 1981-10-29 JP JP56503599A patent/JPS57501698A/ja active Pending
  • 1981-10-29 WO PCT/US1981/001456 patent/WO1982001511A1/en not_active Ceased
  • 1981-10-29 EP EP19810903045 patent/EP0063591A4/de not_active Withdrawn

Non-Patent Citations (1)

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