US3672601A - Film feeding mechanism with movable cartridge mounting means - Google Patents

Film feeding mechanism with movable cartridge mounting means Download PDF

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Publication number
US3672601A
US3672601A US76080A US3672601DA US3672601A US 3672601 A US3672601 A US 3672601A US 76080 A US76080 A US 76080A US 3672601D A US3672601D A US 3672601DA US 3672601 A US3672601 A US 3672601A
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United States
Prior art keywords
roll
leading end
strip material
movement
driving member
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Expired - Lifetime
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US76080A
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English (en)
Inventor
John J Bundschuh
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Eastman Kodak Co
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Eastman Kodak Co
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Publication date
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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
    • G03B1/00—Film strip handling
    • G03B1/56—Threading; Loop forming

Definitions

  • paratus means for mounting the film roll so that it may be moved into engagement with the drive member and stripper finger.
  • This type of mechanism includes a drive member comprising a longitudinally traveling endless belt or other drive means which is movable into peripheral contact with a roll of film or other strip material wound onto a rotatably supported supply reel, to thereby impart unwinding rotation to that roll. Additionally, a stripper finger is movable into engagement with the periphery of the roll to separate the leading end: of the strip material therefrom and to guide it along a predetermined threading path established in part between the stripper finger and the drive member.
  • Motion picture projectors and related devices incorporating various embodiments of the above-described mechanism and different means. for automatically effecting properly timed coordinationof the movements of the drive member and stripper finger by power operated means are disclosed in commonly assigned U.S. Pat. application Ser. No. 643,502, entitled CINEMATOGRAPHIC CARTRIDGE PROJECTOR APPARATUS, filed in the names of John J. Bundschuh, Robert J. Roman and Kenneth W. Thomson on June 5, I967
  • Another embodiment of the same type of film feeding mechanism is disclosed in commonly assigned U.S. Pat. application Ser. No. 772,165, entitled “SELF-THREADING MO- TION PICTURE PROJECTOR OR THE LIKE,” filed in the name of Robert J. Roman on Oct. 31 1968 which is directed to a simplified manually operated control system for effecting the movement of the stripper finger and drive member into and out of engagement with the roll in proper coordination with the operation of other elements of the projector or related machine.
  • the stripping function is accomplished by movement of the drive member and stripper finger from positions spaced from the film roll to positions in which they engage the film roll.
  • Relatively complicated mechanisms must be provided to effect simultaneous and properly oriented movement of the mechanism parts while also providing a guide for the film from the roll to the threading path of the projector. Although such mechanism performs very satisfactorily, its relatively high cost may reduce its utilization in lower priced projectors or other apparatus.
  • The. present invention is directed .to providing a simplified and relatively inexpensive apparatus which automatically adjusts and coordinates the operations of the projector during the threading mode.
  • a motion picture projector having means for movably supporting .
  • a roll of strip material having a leading end is provided with a film feeding mechanism positioned such that the film roll may be moved into and out of engagement with the mechanism.
  • the film feeding mechanism when in en gagement with the roll, is operative to drive the roll in an unwinding direction and to lift the; leading end of the. strip material from the roll.
  • the mechanism has portions which form a guide for directing the leading end of the strip material more apparent in the detailed description of the preferred embodiment presented below.
  • FIG. 1 is an elevational view of a portion of a cartridge loaded self-threading motion picture projector according to a preferred embodiment of the present invention with a film cartridge and reel mounted thereon;
  • FIG. 2 is a sectional view taken along line 2-2 of FIG. 1;
  • FIG. 3 is a view similarto FIG. 1 showing a cartridge having a relatively large diameter roll of film depressed to its thread position;
  • FIG. 4 is a view similar to FIGS. 1 and 2 showing a cartridge having a relatively small diameter roll of film depressed to its thread" position;
  • FIG. 5 is a view of the film stripping mechanism of the projector shown in FIG. I in its position assumed during project mode;
  • FIG. 6 is a rear elevational view of a portion of the projector shown in FIG. I illustrating the spindle drive mechanism.
  • a projector frame plate 10 which may be oriented eithervertically, horizontally or at an inclined angle during projection, supports various operative projector components. Plate 10 is provided with four pins l2, 14, 16 and l8 which project outwardly and with a slot 20.
  • a splined, reel drive spindle 22 (which comprises part of a roll supporting means) projects through slot to receive a film supply reel 24 located within a film cartridge 26.
  • the cartridge is releasably mounted on a movable support plate 28.
  • Plate 28 may be provided with means such as slots for receiving mating structure such as ribs on the cartridge to locate and securely mount the cartridge.
  • Film supply cartridge 26, per se is further depicted and described in the above-identified commonly assigned U.S. Pat. applications Ser. Nos. 643,502; 643,503; 731,562 and 736,524.
  • the cartridge includes a base member and a cover member which are attached to each other to define a generally cylindrical internal chamber adapted to accommodate film supply reel 24 carrying a roll of film 34 (FIGS. 3 and 4).
  • the portion of the cartridge body member opposite the cover member extends outvvardly to define flat support surfaces 36 at opposite sides of a semicircumferential slot 38 which provides access to the film wound onto supply reel 24 within cartridge 26.
  • the cartridge is adapted to be positioned on support plate 28 by the reception of the cartridge in a releasable latching mechanism including a pair of tabs 40 and 42 which are receivable in mating recesses in the cartridge and a spring catch 44 at the top of the cartridge.
  • Support plate 28 has a, pair of slots 46 and 48 through which pins l2, l4, l6 and 18 project so that support plate 28 is vertically movable with respect to plate 10, support plate 28 carrying cartridge 26 therewith.
  • Support plate 28 and pin-in-slot arrangement including slots 46 and 48 and pins 12, l4, l6 and 18 comprise a portion of the means for mounting roll 34 for movement between a first position spaced from the stripping mechanism described below and a second position contacting the stripping mechanism.
  • the film feeding mechanism of the present invention comprises a film driving belt member 50 and a stripper finger 52.
  • Belt member 50 includes an endless elastic drive belt 54 of circular cross-section surrounding three pulleys (not shown) which are supported in coplanar relation to one another between a pair of side plates on shafts 56-58.
  • One of the shafts is powered by means not shown to drive belt 54 in a counterclockwise direction as viewed in FIG. 1.
  • Stripper finger 52 is pivotally attached at 60 to plate 10 and is biased in a counterclockwise direction by a spring 62.
  • a cartridge follower lever 64 is pivotally mounted at 66 and is biased for movement in a counterclockwise direction by a spring 68 until it abuts a stop or peg 70 on plate 10.
  • Cartridge follower lever 64 is aligned with the rear support surface 36 of a received cartridge 26 and is out of the plane of finger 52.
  • a finger positioning lever 72 is also mounted for rotation about pivot 66.
  • Lever 72 is biased for clockwise rotation relative to cartridge follower lever 64 by a spring 74 that has end portions engaging flanges on levers 64 and 72. Such relative motion is limited by contact between lever 72 and a tab 76 which projects from follower lever 64.
  • a lip 78 on positioning lever 72 contacts a surface 80 on finger 52.
  • spring constants of springs 62 and'74 are such that upon clockwise rotational movement of follower lever 64, positioning lever 72 will remain against tab 76 and will rotate finger 52 in a clockwise direction against the force of spring 62. When positioning lever 72 reaches a lug 82 on plate 10, it will no longer rotate, whereby additional downward movement of cartridge '26 together with clockwise rotation of follower lever 64 will not impart movement to finger 52.
  • l have shown a rear view of a mechanism for driving spindle 22 for rewind, to tighten the roll prior to stripping for tendency drive, etc.
  • the spindle is shown in solid lines in its normal raised position, being constantly biased towards that position by a spring 88.
  • Spindle 22 projects through plate 10 and is rotatably carried by an end portion of arm 90.
  • Ann 90 is pivotally attached at its opposite end portion to a second arm 92 which is rotatably mounted on plate 10.
  • Power to drive spindle 22 is transmitted from a motor, not shown, by a drive shaft 94, a pulley 96 on shaft 94, a drive belt 98, a pulley 100, a drive belt 102, a pulley 104 and a final drive belt 106.
  • Depression of cartridge 26 and support plate 28 moves spindle 22 downwardly towards the position shown in broken lines in FIG. 6. It can be seen that arms 90 and 92 move accordingly towards the broken line positions in which they are shown in FIG. 6. 1
  • cartridge 26 and support plate 28 are manually depressed until the rear support surface 36 of the cartridge engages cartridge follower lever 64. Additional downward movement of the cartridge and support plate causes follower lever 64 and positioning lever 72 to rotate in a clockwise direction about pivot 66. Contact between lip 78 and surface of finger 52 causes finger 52 to rotate about pivot 60. j
  • cartridge 26 may be released and is returned to the position shown in FIG. 1 by spring 88.
  • the springs 62, 68 and 74 return finger 52 and levers 64 and 72 to their normal positions.
  • film will wrap around a projection 87 and be pulled past finger 52 and film driving belt member 50 by the projector apparatus without touching either of these devices.
  • the relative positions of the finger, belt member and film during normal project mode of the apparatus is shown in FIG. 5.
  • a stripping mechanism including means when contacted by the roll for separating the leading end of the strip material from the roll and for conducting the leading end away from the roll;
  • said means for mounting said roll supporting means includes a first plate;
  • said roll supporting means includes a second plate having means thereon for rotatably holding a roll, said second plate being mounted on said first plate for translation movement to carry the roll between its first and second positions.
  • said roll supporting means further includes a spindle rotatably extending through said first and second plates, said spindle being constrained to only rotational movement relative to said" second plate and to rotational and translational movement relative to said first plate.
  • Apparatus adapted to cooperate with a roll of strip material to separate the leading end of such material from the roll and to conduct the leading end away from the roll, said apparatus comprising:
  • a driving member having means for imparting rotational movement to such rolls of strip material while in peripheral engagement therewith such as to unwind strip material therefrom;
  • a stripper member for separating the leading end of the strip material from the'roll when said stripper member is contacted by the roll and the driving member imparts such rotational movement to the roll;
  • said driving member comprises:
  • said roll engaging element including an endless belt trained about said pulleys.
  • a spindle rotatably extending through said plates, said spindle being constrained to only rotational movement relative to one of said plates and to rotational and translational movement relative to the other of said plates.
  • said driving member includes l) a plurality of pulleys and (2) a roll engaging element including an endless belt trained around said pulleys;
  • said stripper member includes a finger for engaging the periphery of the roll for separating the leading end from the roll.
  • Apparatus adapted to cooperate with a roll of strip material to separate the leading end of such material from the roll and to conduct the leading end away from the roll, said apparatus comprising:
  • a driving member having means for imparting rotational movement to such rolls of strip material while in peripheral engagement therewith such as to unwind the strip material therefrom;
  • stripper member for separating the leading end of the strip material from the roll when said stripper member is contacted by the roll and the driving member imparts such rotational movement to the roll, said stripper member being movable between a'first position spaced from said driving member to define therewith a relatively wide channel and a second position closely adjacent said driving member to define a relatively narrow threading path;
  • Apparatus adapted to cooperate with a roll of strip material rotatably carried in a cartridge to separate the leading end of such material from the roll and to conduct the leading end away from the roll, said apparatus comprising:
  • a driving member having means for imparting rotational movement to such rolls of strip material while in peripheral engagement therewith such as to unwind strip material therefrom;
  • stripper member for separating the leading end of the strip material from the roll when said stripper member is contacted by the roll and the driving member imparts rotational movement to the roll, said stripper member being movable from a first position spaced widely from said driving member to a second position closely adjacent said driving member to define with said driving member a threading path for the strip material;
  • a first lever positioned in the path of movement of the cartridge during such translational movement of the roll for movement therewith;
  • a second lever movable with said first leverduring a first portion of the movement of said first lever for moving said stripper member from its first to its second position; and y means preventing additional movement of said second lever during subsequent movement of said first lever.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Replacement Of Web Rolls (AREA)
US76080A 1970-09-28 1970-09-28 Film feeding mechanism with movable cartridge mounting means Expired - Lifetime US3672601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7608070A 1970-09-28 1970-09-28

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US3672601A true US3672601A (en) 1972-06-27

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US76080A Expired - Lifetime US3672601A (en) 1970-09-28 1970-09-28 Film feeding mechanism with movable cartridge mounting means

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US (1) US3672601A (ref)
CH (1) CH541157A (ref)
DE (1) DE2148188A1 (ref)
FR (1) FR2106283A5 (ref)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080173711A1 (en) * 2004-09-13 2008-07-24 Michael Handfield Method and system for communicating with a medicaments container

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161361A (en) * 1961-12-21 1964-12-15 Eiraku Denki Kabushiki Kaisha Tape recorder
US3252668A (en) * 1963-06-10 1966-05-24 Donald J Moloney & Associates Sound tape cartridge and apparatus
US3550879A (en) * 1965-07-08 1970-12-29 Eastman Kodak Co Cinematographic cartridge projector apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161361A (en) * 1961-12-21 1964-12-15 Eiraku Denki Kabushiki Kaisha Tape recorder
US3252668A (en) * 1963-06-10 1966-05-24 Donald J Moloney & Associates Sound tape cartridge and apparatus
US3550879A (en) * 1965-07-08 1970-12-29 Eastman Kodak Co Cinematographic cartridge projector apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080173711A1 (en) * 2004-09-13 2008-07-24 Michael Handfield Method and system for communicating with a medicaments container

Also Published As

Publication number Publication date
CH541157A (fr) 1973-08-31
FR2106283A5 (ref) 1972-04-28
DE2148188A1 (de) 1972-03-30

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