US3838833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threading device
Assignee: Eastman Kodak Co
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Filing: 1972-05-08
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Granted: 1974-10-01
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Expires: 1992-05-08
Abstract
Abstract A threading device is provided for use with a motion picture projector of the type adapted to receive a roll of film upon a rotatable spindle which may be inside a cartridge. The threading device includes a support member that is adapted to be moved into contact with a received cartridge to align and firmly hold the cartridge in position. The threading device further includes a member having a hook portion that is adapted to be moved through an opening in the wall of the cartridge and into close proximity with the roll where it engages an opening in the leading end portion of the rotating roll of film. After the film is engaged by the hook member, the hook extracts the leading end of the film from the cartridge and delivers it to transport means of the projector. The hook is then disengaged from the film and moved to a retracted position to avoid interfering with the normal operation of the projector.
Inventors
- 👤 C Hopfner
- 👤 W Ort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:55
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/323; G03B1/00; G03B1/42; G03B1/48; G03B1/50; G03B1/56
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
238 words
An improvement in apparatus of the type having (1) a rotatable spindle mounted in a fixed position, with the spindle adapted to receive a roll of web material located in a cartridge and having a perforation at a spaced distance from the end of the web, and (2) a transport means for moving the web along a desired path in the projector, the improvement comprising: a. housing means; b. support means movably supported by said housing means for aligning and holding a received cartridge; c. means for moving said support means between (1) a first position wherein said support means is in spaced relation from a received cartridge, and (2) a second position wherein said support means is engageable with a received cartridge; d. withdrawal means for (1) engaging the web material contained in a received cartridge through the perforation in the material, and (2) withdrawing and directing the web away from the cartridge toward the transport means of the apparatus; and e. means for moving said withdrawal means (1) from a first position wherein said withdrawal means is in spaced relation from a received cartridge to a second position wherein said withdrawal means engages the web material, and (2) from said second position after said withdrawal means has engaged the web material to a third position herein said withdrawal means extracts the web from the cartridge and directs the web toward the transport means of the projector.
Claim 2
Dependent Claim
238 words
An improvement in apparatus of the type having (1) a rotatable spindle mounted in a fixed position, with the spindle adapted to receive a roll of web material located in a cartridge and having a perforation at a spaced distance from the end of the web, and (2) a transport means for moving the web along a desired path in the projector, the improvement comprising: a. housing means; b. support means movably supported by said housing means for aligning and holding a received cartridge; c. means for moving said support means between (1) a first position wherein said support means is in spaced relation from a received cartridge, and (2) a second position wherein said support means is engageable with a received cartridge; d. withdrawal means for (1) engaging the web material contained in a received cartridge through the perforation in the material, and (2) withdrawing and directing the web away from the cartridge toward the transport means of the apparatus; and e. means for moving said withdrawal means (1) from a first position wherein said withdrawal means is in spaced relation from a received cartridge to a second position wherein said withdrawal means engages the web material, and (2) from said second position after said withdrawal means has engaged the web material to a third position herein said withdrawal means extracts the web from the cartridge and directs the web toward the transport means of the projector.
Claim 3
Dependent Claim
50 words
The improvement as set forth in claim 1 wherein the improvement further comprises: a. guide means for receiving the web material from the withdrawal means and directing it along a path to the transport means of the projector; and b. means for driving said web material along said guide means.
Claim 4
Dependent Claim
58 words
The improvement as set forth in claim 2 wherein said guide means comprises a first portion attached to the projector and the second portion attached to said support means, said first and second portions fit together in a telescopic manner such that said guide means can be extended in length as said support moves toward said second position.
Claim 5
Dependent Claim
71 words
The improvement as set forth in claim 1 wherein said withdrawal means comprises an elongated member having a hook portion, the hook portion being movable through an opening in the cartridge and into said second position wherein the hook portion is engageable with the perforation in the web material when the roLl of web material in the cartridge is rotated in a direction for taking up the web onto the roll.
Claim 6
Dependent Claim
50 words
The improvement as set forth in claim 1 wherein said improvement further comprises a normally open first switch means for controlling a function of the apparatus, wherein said switch being positioned to be closed when the support means is in said second position and said support means engages a cartridge.
Claim 7
Dependent Claim
86 words
The improvement as set forth in claim 5 wherein said improvement further comprises electromagnetic means coupled to said withdrawal means, said electromagnetic means being controlled by said first switch means and charging a first state wherein said electromagnetic means is not energized and a second state wherein said electromagnetic means is energized, said electromagnetic means when energized causing said withdrawal means to cooperate with said means for moving said withdrawal means to effect movement of the withdrawal means from said first position to said second position.
Claim 8
Dependent Claim
77 words
The improvement as set forth in claim 6 wherein the improvement further comprises a normally closed second switch means adapted for controlling said electromagnetic means, said switch being positioned to be opened when said withdrawal means is in said second position, such that said electromagnetic means is de-energized causing said withdrawal means to cooperate with said means for moving said withdrawal means, resulting in movement of the withdrawal means from said second position to said third position.
Claim 9
Dependent Claim
30 words
The improvement as set forth in claim 1 wherein said support means further comprises a bar having a positioning lug for aligning a received cartridge upon contact with said cartridge.
Claim 10
Dependent Claim
25 words
The improvement as set forth in claim 1 further comprising aligning marks on the housing for provisionally aligning cartridges of different sizes on the housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |