US3829035A

US3829035A - Bulk film loading device

Info

Publication number: US3829035A
Application number: US00305053A
Authority: US
Inventors: N Backscheider
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-11-09
Filing date: 1972-11-09
Publication date: 1974-08-13
Anticipated expiration: 1991-08-13

Abstract

A device for loading bulk film on a cassette having a first film holding chamber and a second cassette holding chamber. Film passes through a slot in a wall between the chambers. A drum member is mounted in the first chamber. The drum member includes a wall provided with an opening therein. The wall of the drum turns inside of and adjacent the wall of the first chamber between a first position in which the opening and the slot are aligned and a second position in which the drum wall closes the slot. A door closes the second chamber. A disc is mounted on the door and is engageable with the drum. A socket in the drum is opposed to the disc when the drum is in slot closed position. A portion of the disc advances into the socket when the door is open to lock the drum against turning when the door is open. When the door is closed, the drum enters a cut away portion of the disc when the drum is turned to slot open position to lock the door against opening when the drum is in slot open position.

Description

United States Patent n91 Backscheider BULK FILM LOADING DEVICE [76] Inventor: Nickolas A. Backscheider, 4415 Appleton Ave., Mariemont, Ohio 45209 [22] Filed: Nov. 9, 1972 [21] App]. No.: 305,053

[52] US. Cl. 242/7l.7 [51] Int. Cl. G03b 17/26 [58] Field of Search 242/7l.7; 70/312; 95/11 R [56] References Cited UNITED STATES PATENTS 2,298,339 10/1942 Boes 242/71.7X

Primary Examiner.lohn W. Huckert Assistant Examiner-John M. Jillions Attorney, Agent, or Firm-James W. Pearce; Roy F. Schaeperklaus [57] ABSTRACT A device for loading bulk film on a cassette having a 1 Aug. 13, 1974 first film holding chamber and a second cassette holding chamber. Film passes through a slot in a wall between thechambers. A drum member is mounted in the first chamber. The drum member includes a wall provided with an opening therein. The wall of the drum turns inside of and adjacent the wall of the first chamber between a first position in which the opening and the slot are aligned and a second position in which the drum wall closes the slot. A door closes the second chamber. A disc is mounted on the door and is engageable with the drum. A socket in the drum is opposed to the disc when the drum is in slot closed position. A portion of the disc advances into the socket when the door is open to lock the drum against turning when the door is open. When the door is closed, the drum enters a cut away portion of the disc when the drum is turned to slot open position to lock the door against opening when the drum is in slot open position.

5 Claims, 13 Drawing Figures BULK FILM LOADING DEVICE This invention relates to a device for loading bulk film in a cassette or the like. More particularly, this invention relates to an improved light trapping and film loading arrangement for such a device.

An object of this invention is to provide a bulk film loading device having a door which can be opened for threading film and to a light trapping arrangement which prevents light from reaching bulk film in the device when the door is open.

A further object of this invention is to provide such a device in which there are interlocks between the door and the light trapping arrangement so that the door cannot be opened except when the light trap is closed.

Briefly, this invention provides a bulk film loading device having a first chamber in which bulk film is mounted and a second chamber in which a cassette can be mounted. A door can be opened to provide access to the secondchamber. Bulk film can pass through an opening in a wall between the chambers. A light trapping drum is mounted in the first chamber and can be turned between an open position in which a slot in the drum is aligned with the opening between chambers and a closed position in which a portion of a wall of the drum closes the opening. A locking disc, which pivots with the door, is received in a slot in the drum to lock the drum in closed position when the door is opened and to prevent opening of the door when the drum is in open position.

The above and other objects and features of the invention will be apparent to those skilled in the art to which this invention pertains from the following detailed description and the drawings, in which:

FIG. 1 is a perspective view of a bulk film loading device constructed in accordance with an embodiment of this invention with a door thereof in open position, a cassette being shown in place therein;

FIG. 2 is a fragmentary plan view of the device with the door closed;

FIG. 3 is a fragmentary plan view of the device with the door open;

FIG. 4 is a view in section taken on the line 44 in FIG. 2;

FIG. 5 is a view in section taken on the line 55 in FIG. 3;

FIG. 6 is a fragmentary exploded perspective view showing the upper portion of a door hinging structure of the device;

FIG. 7 is a fragmentary view partly in plan and partly in horizontal section of the device with the door closed;

FIG. 8 is a fragmentary view partly in plan and partly in horizontal section of the device with the door open;

FIG. 9 is a view in section taken on the line 99 in FIG. 8;

FIG. 10 is a view in section taken on the line l0-l0 in FIG. 7;

FIG. 11 is a view in section taken on the line 11-11 in FIG. 1;

FIG. 12 is a view in section taken on the line 12l2 showing the cassette of FIG. 1 in position thereof; and

FIG. 13 is a view in section taken on the line 13l3 in FIG. 11 showing another cassette mounted in the device.

In the following detailed description and the drawings, like reference characters indicate like parts.

In FIG. 1 is shown a bulk film loading device 20 constructed in accordance with an embodiment of this invention. The film loading device 20 includes a main body 22 comprising a main bulk film holding chamber 23 and a smaller cassette holding chamber 24. The main chamber 23 includes a bottom or floor panel 26 (FIG. 10) and an upwardly extending substantially cylindrical wall 27 provided with a slot 28 (FIGS. 7 and 8) communicating with the smaller chamber 24. A central pin 29 is mounted in a boss 30 (FIG. 10) at the center of the floor panel 26. A sleeve 31 rotatably mounted on the pin 29 can receive a roll of bulk film 32 (FIG. 7) with an end portion 33 of the film extending through the slot 28. Ribs 35, which extend upwardly from the floor panel 26, support the roll 32 of film. A drum member 34 is rotatably mounted on the pin 29. A main flange 36 (FIG. 10), which extends outwardly of a main upper panel 361 of the drum member 34, rests on the upstanding cylindrical wall 27. An annular flange 38 on the main drum flange 36 extends into a groove 39 in the upper edge of the wall 27 to form a light seal therebetween. A substantially cylindrical downwardly extending wall 41 of the drum member 34 turns inside the wall 27 of the main chamber 23 adjacent thereto. A slot or opening 42 in the wall 41 (FIG. 7) of the drum can register with slot 28 in the wall 27 as shown in FIG. 7. The drum member 34 can be turned to the FIG. 8 position in which the

slots

28 and 42 are out of registry. A block 43 mounted on the floor panel 26 limits swinging of the drum member 34. A nut 44 (FIG. 10) threaded on the upper end of the pin 29 holds the drum member 34 and the main body 22 in assembled relation. When the drum 34 is in closed position, as shown in FIG. 8, the endportion 33 of the film is held against the outer face of the wall 41 by a rounded edge 46 of the wall 27 at the slot 28.

The end portion 33 of the film extends across the chamber 24 and can be wound on a cassette 47 by turning of a crank 48. As shown in FIG. 11, the crank 48 carries a slotted head 49 which can engage a spindle 491 (FIG. 12) of the cassette 47 (FIG. 1). The upper end of the cassette 47 is held by a spring-pressed plunger 50 (FIG. 11) which is urged downwardly by a compression spring 51. A cassette guide 52 is mounted inside the chamber 24 for guiding the cassette 47 into position between the plunger 50 and the crank head 49. The guide 52 is attached to a lower or floor panel 53 of the chamber 24 by a pivot pin 56 (FIG. 1) and a screw fastener 57 (FIG. 11) which can extend into a boss 571 of the guide 52. As the end portion 33 of the film enters the chamber 24, it passes over a sprocket 58 (FIGS. 7 and 10) which carries an upstanding pin 59. The pin 59 acts to turn a gear 61 which actuates counting dials 62 and 63 (FIGS. 2 and 3) to indicate the amount of film delivered to the cassette 47. The sprocket 58 is rotatably mounted on a post 64 which extends upwardly from the floor panel 53. The end portion of the film is guided by the post 64 as shown in FIGS. 7 and 8.

The chamber 24 is closed by a door panel 66 (FIG.

1) which includes a pin portion 67 (FIGS. 4 and 5) pivotally mounted in a socket 68 in the floor panel 53 and a bore 69 in a cover plate 71 which forms an upper wall for the chamber 24. Fasteners 72 (FIG. 1), 721 and 722 (FIG. 2) attach the cover plate 71 to the main body 22. The door panel 66 carries film guides 74 and 75 (FIG. 1). The upper end of the pin portion 67 is square in section as indicated at 76 in FIG. 6 and is exposed above the cover plate 71. A disc 77 having a square central opening 78 is received on the square portion 76 and is held thereon by a washer 79 and a screw fastener 81. The disc rests on a curved bearing ridge 83 of the cover plate 71. A portion of the disc 77 is cut away on an are 84 so that when the door panel 66 is closed as shown in FIG. 2, the main flange 36 of the drum member 34 fits closely against the cut away portion 84 and the door panel is locked closed when the drum 34 is in the FIG. 7 position with the

slots

28 and 42 aligned. When the drum 34 is moved to. the FIGS. 3 and 8 position, the disc 77 is aligned with a socket or slot 87 in the flange 36, and the door panel 66 can be swung to open position. In the door open position, the

slots

28 and 42 are out of alignment, as shown in FIG. 8, and the

walls

27 and 41 form a light trap preventing entrance of light into the interior of the chamber 23. The disc 77 is received in the socket 87 and locks the drum against turning when the door panel 66 is open. Edges of the door panel 66 (FIG. 1) and of the floor panel 53, the cover plate 71 and a rear wall 90 of the chamber 24 are provided with interlocking portions to prevent entrance of light into the chamber 24 when the door panel 66 is closed. A tab 91 on the door panel can be engaged for opening the door panel when a cassette is to be loaded in or removed from the chamber 24.

The screw fastener 57 (FIG. 11) can be unscrewed to be released from the boss 571, and the guide 52 can be swung back about the pivot pin 56 to the position shown in FIG. 13 to provide a space sufficiently large to receive a large cassette 93 with the large cassette 93 engaging a rounded portion 94 of a wall 96 of the main body 22 and a lug 97 of the cassette 93 received in a socket 98 in the wall 96 to position the cassette 93 so that film 99 can be wound thereon in the same manner as with the smaller cassette described hereinabove.

The bulk film loading device illustrated in the drawings and described above is subject to structural modification without departing from the spirit and scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by letters patent is:

I. A device for loading bulk film on a cassette which comprises a body having a first chamber and a second chamber therein, a wall in the body separating the chambers, there being a slot in the wall for passage of film, means for mounting a roll of film in the first chamber with an end portion of the roll of film extending through the slot, a drum member mounted in the film chamber, the drum member having a wall provided with an opening therein, the wall of the drum turning inside of and adjacent the wall of the body member between a first position in which the opening and the slot are aligned and a second position in which the drum wall closes the slot, a door for closing the second chamber, the door having a hinge pin portion rotatably mounted adjacent the drum, a disc mounted on the hinge pin portion for rotation in unison with the hinge pin and door and engageable with the drum, there being a socket in the drum opposed to the disc when the drum is in slot closed position, a portion of the disc advancing into the socket when the door is open to lock the drum against turning when the door is open, the disc having a cut away portion opposed to the drum when the door is closed, the drum entering the cut away portion when the drum is turned to slot open position to lock the door against opening when the drum is in slot open position, means for mounting a cassette in the second chamber, and means for turning a spindle of the cassette to wind the film on the cassette.

2. A device as in claim 1 wherein the drum wall and the wall of the first chamber are adapted to hold the end portion of the film therebetween adjacent the slot when the drum is in slot closed position.

3. A device as in claim 1 wherein there are film guides on the door which guide the film to the cassette.

4. A device as in claim 1 wherein the end portion of the film passes in engagement with a post, a sprocket is mounted on the post, the sprocket is engaged by the film and is turned as the film advances, and the sprocket actuates counting mechanism.

5. A device as in claim 1 wherein the wall of the first chamber has an inwardly projecting smooth curved surfaced rib extending transversely of the direction of drum wall movement, and the drum wall and the rib on the wall of the first chamber are adapted to hold the end portion of the film therebetween adjacent the slot when the drumis in slot closed position.

Claims

1. A device for loading bulk film on a cassette which comprises a body having a first chamber and a second chamber therein, a wall in the body separating the chambers, there being a slot in the wall for passage of film, means for mounting a roll of film in the first chamber with an end portion of the roll of film extending through the slot, a drum member mounted in the film chamber, the drum member having a wall provided with an opening therein, the wall of the drum turning inside of and adjacent the wall of the body member between a first position in which the opening and the slot are aligned and a second position in which the drum wall closes the slot, a door for closing the second chamber, the door having a hinge pin portion rotatably mounted adjacent the drum, a disc mounted on the hinge pin portion for rotation in unison with the hinge pin and door and engageable with the drum, there being a socket in the drum opposed to the disc when the drum is in slot closed position, a portion of the disc advancing into the socket when the door is open to lock the drum against turning when the door is open, the disc having a cut away portion opposed to the drum when the door is closed, the drum entering the cut away portion when the drum is turned to slot open position to lock the door against opening when the drum is in slot open position, means for mounting a cassette in the second chamber, and means for turning a spindle of the cassette to wind the film on the cassette.

5. A device as in claim 1 wherein the wall of the first chamber has an inwardly projecting smooth curved surfaced rib extending transversely of the direction of drum wall movement, and the drum wall and the rib on the wall of the first chamber are adapted to hold the end portion of the film therebetween adjacent the slot when the drum is in slot closed position.