US3542310A - Film-feeding device - Google Patents

Film-feeding device Download PDF

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Publication number
US3542310A
US3542310A US726813A US3542310DA US3542310A US 3542310 A US3542310 A US 3542310A US 726813 A US726813 A US 726813A US 3542310D A US3542310D A US 3542310DA US 3542310 A US3542310 A US 3542310A
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US
United States
Prior art keywords
film
roller
belt
support member
cartridge
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.)
Expired - Lifetime
Application number
US726813A
Other languages
English (en)
Inventor
Eduard Keznickl
Heinz Wilhelm Broeckl
Alfons Valoh
Harald Schmidt
Michael Drahonovsky
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.)
RAIMUND HAUSER
Original Assignee
Individual
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
Priority claimed from AT458367A external-priority patent/AT268885B/de
Priority claimed from AT288968A external-priority patent/AT279359B/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3542310A publication Critical patent/US3542310A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/321—Holders for films, e.g. reels, cassettes, spindles
    • G03B21/323—Cassettes
    • 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
    • G03B1/00—Film strip handling
    • G03B1/56—Threading; Loop forming

Definitions

  • a friction roller is arranged to thread the film and atleast one guiding roller spaced a distance from the friction roller and connected with a belt together propping in the operative positionimmediately against the circumference of the film coil
  • At least one third roller is looped by the belt and the central points of the three rollers lie at the corner points of a fictitious triangle, whereby preferably, upon threading the leading film end out of the cartridge, the portion of the belt lying between the guiding and the friction roller intersects a runway of the film located inside the cartridge under an obtuse angle, of which the opening is opposite the runoff direction of the film.
  • the invention relates to a film-feeding device, especially for film cartridges with a supply reel and an opening in the cartridge wall, into which opening a friction roller, arranged on a movable support member or the like, is inserted to thread the film, wherein at least one guiding roller is provided, which is preferably arranged on the support member and which is Spaced a distance from the friction roller in the moving direction of the support member, the distance being larger than the maximum way of the support member, so that the guiding roller remains always outside the cartridge, and wherein the friction roller is connected with a belt of rubber or the like, with which the friction roller props in its operating position immediately against the circumference of the film coil.
  • Film apparatus have already been suggested, which are provided with means for the reproduction of films arranged in cartridges and which show film feeding devices for guiding the leading end of the film out of the cartridge.
  • These devices comprise a stripper disposed on the apparatus, which upon threading the film is inserted into the cartridge and abuts to the film coil, and a friction roller, which during the threading operation is pressed against the film coil in the runoff direction of the film immediately in front of the stripper, thus driving thefilm coil.
  • such a stripper is disposed inside the cartridge.
  • this problem is'solved in that at least a third roller looped by the belt, is provided and that the central points of the three rollers lie at the corner points of a fictitious triangle, whereby preferably, upon threading the leading film end outof the cartridge, the portion of the belt lying between the guiding and the friction roller intersects a runway of the film located inside the cartridge under an obtuse angle, of which the opening is opposite the runoff direction of the film.
  • the central points of the three rollers lie at'the corner points of a fictitious triangle, the angle under which the film encounters the belt, becomes relatively wide, so that the film is reliably pushed to thefilm coil.
  • the inventive measure is advantageous for cartridges in which the opening forthe insertion ofthe friction roller is at the same time the outlet opening opening for the film, as well as for .cartridges where an outlet separate from the-opening for the friction roller is provided.
  • the inventive device could also be applied to film coils not arranged in cartridges or the like.
  • the arrangement of an advanced development of the invention shows the guiding roller formed as tension roller, whereas the third roller formed as driving roller is stationary, whereby the tension roller is preferably pivoted on a shiftable and turnable bolt lever coupled with the support member.
  • the tension roller has sometimes to perform considerable compensating movements, when the friction roller is inserted into or guided out of the cartridge.
  • the support member or the like bearing the friction roller supports a further roller on its end averted from the friction roller, which further roller serves to guide the belt. This roller helps to compensate the changes of length of the belt and consequently reduces the oscillating movements of the boit lever.
  • the inventive film feeding device preferably is improved in that the support member bearing the friction roller is guided during its movement into, respectively out of its operating position along a curve, the parameters of which are chosen so, that the channel in independence of the diameter of the coil essentially has a constant width.
  • the stripper preferably may be arranged on a film apparatus, abutting at least in operating position, particularly spring urged, the circumference of the coil.
  • This embodiment of the invention is especially adapted for film cartridges in which the opening for inserting the friction roller is also the outlet opening for the film.
  • FIG. 1 is an elevational view, partly broken away, ofa projector with the device in accordance with the present invention
  • FIG. 2 is an enlarged cross-sectional view ofan embodiment of the invention illustrating the cartridge
  • FIG. 3 is an elevational view, partially broken away, of a projector with another embodiment ofthe present invention.
  • FIG. 4 is an enlarged plan view of the device of FIG. 3 in rest position
  • FIG. 5 is a view similar to FIG. 4 showing the same device in operating position
  • FIG. 6 is a side elevation, partly in section, corresponding to the arrow VI of FIG. 5;
  • FIG. 7 is a sectional view taken along the lines VIIVII of FIG. 5.
  • a supply reel is rotatably arranged and is provided with a film coil I04 disposed on a reel core 103 of a reel 102.
  • a support member 108 is inserted into the cartridge through an opening 107 in the cartridge wall, bearing on its front portion a friction roller 109.
  • the friction roller 109 arrives between the flanges of the reel 102 and props by means of a belt against the film coil.
  • the belt preferably made of rubber simultaneously serves to establish the drive connection with the roller 116, which is energized by a schematically indicated motor 117.
  • I is swingably mounted, which roller 109 rotating counterclockwise sense, the leading end of the film is moved in a more or less-curved form in clockwise sense in the direction of the outlet opening 106 of the cartridge whereby the leading film end generally abuts the inner cylindrical cartridge wall 110.
  • the support member 108 108 together with the motor 117- is shiftable in longitudinal direction and guided'by bolts l18, connected with the housing and engaging longitudinal slots 119. (FIG. 2 shows one bolt 118 and one longitudinal slot 119.)
  • the front portion of the support member 108 bears an oblique, upwards directed guiding surface 120.
  • a leaf spring 122 which according to the illustrated embodiment is fastened to the inner cylindrical cartridge wall by means of rest position.
  • a stripper lever 124 is pivotally arranged on an axis 123 and is pressed to the circumference of the coil by means of a spring 125a.
  • the support member 108 shiftable in the longitudinal direction is provided with an extension 135, on which a guiding roller 136 is pivotally arranged for the belt 115.
  • the portion of the belt 115 encountering the roller 109 crosses the inner cylindrical cartridge wall 110 under an obtuse angle, so thatthe leading film end abutting, in this range, the belt 115, is
  • a friction wheel 112 is rotatably arranged in the cartridge 101, which shows a central pin 113 uponwhich the'film reel 102 is slipped.
  • a roller 126 is suitably provided in the projector 125, the roller 126 being driven by a motor 128 by means of a'belt 127 and is adapted 'to rotate the friction wheel 112.
  • the guiding roller 136 is preferably constructed as a tension roller, whereas the roller 116 is stationary.
  • Such a construction is illustrated in a modified form in FIGS. 3 to 7, wherein the roller 116 corresponds to a driving roller 14 and the guiding roller 136 to a tension roller 28.
  • -film cartridges of different size '2, 2a may be set up on the projector. After having set up the carinto the cartridge in order to take off the leading end ofthe film fromthe coil.
  • the device 3 may also be used, when the film coil is not arranged in a cartridge.
  • an operating bar 4 is provided (FIGS. 4, 5).
  • a lever 5 is disposed, pivoted with one end to the butt and turning around an axis of rotation 6.
  • the lever 5 On its other end the lever 5 bears a roller 7.
  • a support member 8 Around the axis of rotation of the roller 7 a support member 8 bears a friction' roller 9 on its front portion.
  • the support member shows further an extension 10, which by means of a pin 11 is guided in a control curve 12.
  • the support member Upon swinging the lever 5, the support member is shifted in the direction of the cartridge 2, respectively the coil disposed therein and in additionperforms a movement determined-by the control curve 12.
  • a belt 13 is guided round the rollers 7, 9, which also loops a stationary driving roller 14.
  • the portion 13a of the belt 13'running from the friction roller 9 to the driving roller.l4 forms a channel together with the stripper 15 in operating position of the device 3, through which channel the film, winding off the coil, is guided.
  • This channel essentially al-' ways has a constant width independent of the diameter of the tridge, a device 3 designed in accordance with the present invention is inserted rivets 121 and abuts the inner cylindrical cartridge wall. in-its coil.
  • the stripper 15 is guided in its movement by control curves 16, 17.
  • the drive for the movement of the stripper 15 results likewise from the operating bar 4.
  • the operating bar 4 has an elongated hole 19, in which a pin 18 of a lever 21 turning around a center of rotation 20, is disposed.
  • the lever 21 is displaced. Consequently the stripper 15 is shifted, which by means of a pin 22 rests in a slot 23 of the lever 21.
  • the lever 21 is spring biased in the sense of pivoting to the operating position of the device 3 (FIG. 5) by a spring 26.
  • the movement of the lever 5 is spring biased by a spring 27.
  • the guiding roller is designed as tension roller 28, resting on a tension lever 29.
  • the tension lever '29 is provided with a longitudinal slot 30.
  • a pin 31 engages in this longitudinal slot and determines the center of rotation of the tension lever 29.
  • the tension lever 29 however is always urged in opposite direction of the coil by means of a spring 32.
  • the extension 10 of the support member 8 is provided with a guiding pin 33. This guiding pin 33 extends in a slot 34 of an extension 35, which is connected with the tension lever and is arranged substantially perpendicularly to the longitudinal axis of the tension lever.
  • FIGS. 6 and 7 a lateral view, respectively a cross section of the inventive device is illustrated, whereby showing a plate 36of the projector 1, in which the control curves 12, and '16, 17 are provided.
  • the projector wall 37 is also illustrated.
  • the device in accordance with the present invention may be designed in different manners. For instance it is advantageous 1.
  • a film-feeding device adapted to be used with a m reel having an outer cylindrical surface, film guide means surrounding said film reel and forming a chamber, said film guide means defining a runway for the film running off from said film reel, a support member having a front portion and a rear portion, said support member being movable into an operating position and into arest position, support member guide means guiding said support member in its movement, first roller means carried by said front portion of said support member and having an outer surface facing said cylindrical surface of said film reel, belt means adapted to engage said outer surface of said roller means, at least secondand third roller means also looped by said belt means and spaced from said first roller means, the centers of these three roller means being arranged in the corner points of a fictitious triangle, driving means adapted to drive said roller means by said belt means in said operating position of said support member: said first roller means abutting said film reel, one portion of said belt
  • roller means being larger than the maximum way of said support member when moving from its rest position into its operating position.
  • a film-feeding device adapted to be used with a film reel having an outer cylindrical surface
  • film guide means sur- I face facing said cylindrical surface of said film reel
  • belt means adapted to engage said outer surface of said first roller means
  • at least second and third roller means also looped by said belt means and spaced from said first roller means, the centers of these three roller means being'arranged in the corner points of a fictitious triangle
  • driving means adapted to drive said roller means by said belt means, in said operating position of said support member: said first roller means abutting said film reel also driven by said belt means, one portion of said belt means intersecting said runway for the film at least at an angle of 90 the opening of said angle being opposite the runoff direction of the film, said second and said third roller means being outside said chamber, whereas in the rest position of said support member said first roller means is spaced from said film reel andsaid film guide means, comprising further stripper means lying close on said cylindrical surface of said film reel at least in operating position of said support member, a film channel formed by said
  • roller means provided on said rear portion of said support member and being adapted to tension at least partially said belt means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Replacement Of Web Rolls (AREA)
US726813A 1967-05-16 1968-05-06 Film-feeding device Expired - Lifetime US3542310A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT458367A AT268885B (de) 1967-05-16 1967-05-16 Filmkassette und Filmaufnahme- oder Wiedergabegerät
AT288968A AT279359B (de) 1968-03-22 1968-03-22 Einrichtung zur mechanischen Abnahme des Anfanges eines auf einem Wickel aufgerollten Bandes

Publications (1)

Publication Number Publication Date
US3542310A true US3542310A (en) 1970-11-24

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Application Number Title Priority Date Filing Date
US726813A Expired - Lifetime US3542310A (en) 1967-05-16 1968-05-06 Film-feeding device

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US (1) US3542310A (en:Method)
GB (1) GB1233708A (en:Method)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666205A (en) * 1970-01-26 1972-05-30 Bell & Howell Co Apparatus for stripping and feeding web material from a supply roll or cartridge
US3670989A (en) * 1970-03-18 1972-06-20 Eastman Kodak Co Cartridge loading motion picture projection apparatus
US3672602A (en) * 1969-03-28 1972-06-27 Agfa Gevaert Ag Mechanism for threading motion picture film in cinematographic apparatus
US3675873A (en) * 1969-09-18 1972-07-11 Silma Cinematographic apparatus
US3734427A (en) * 1970-08-06 1973-05-22 Eastman Kodak Co Adjustable spindle arm for motion picture projectors
US5092535A (en) * 1988-04-11 1992-03-03 Canon Kabushiki Kaisha Film transport apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672602A (en) * 1969-03-28 1972-06-27 Agfa Gevaert Ag Mechanism for threading motion picture film in cinematographic apparatus
US3675873A (en) * 1969-09-18 1972-07-11 Silma Cinematographic apparatus
US3666205A (en) * 1970-01-26 1972-05-30 Bell & Howell Co Apparatus for stripping and feeding web material from a supply roll or cartridge
US3670989A (en) * 1970-03-18 1972-06-20 Eastman Kodak Co Cartridge loading motion picture projection apparatus
US3734427A (en) * 1970-08-06 1973-05-22 Eastman Kodak Co Adjustable spindle arm for motion picture projectors
US5092535A (en) * 1988-04-11 1992-03-03 Canon Kabushiki Kaisha Film transport apparatus

Also Published As

Publication number Publication date
GB1233708A (en:Method) 1971-05-26

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