Patent US4070730A successfully refreshed from Google Patents.
US3931920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip-guiding structure for recording or reproducing apparatus
Assignee: Individual
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Filing: 1974-03-21
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Granted: 1976-01-13
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Expires: 1994-03-21
Abstract
Abstract An apparatus for recording information on a flexible strip or reproducing the information so recorded includes a guide structure for directing a leading end of an oncoming strip, of initially indeterminate curvature, to a self-threading area associated with a take-up reel regardless of strip curvature. The guide structure has an outlet with two or three channels, branching from its inlet, separated by one or two generally wedge-shaped deflectors pointing toward the inlet, the channels being defined by guide rollers establishing points of intersection thereof downstream of the deflector or deflectors.
Inventors
- 👤 Otto Hellinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:31
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/56
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
In motion-picture equipment, in combination: a take-up reel provided with film-threading means for engaging the leading end of an oncoming film strip of indeterminate initial curvature; a guide structure for directing said film strip regardless of its curvature toward said film-threading means across an intervening gap, said guide structure having an inlet for said film strip and an outlet forming a plurality of differently oriented paths leading to said film-threading means; feed means for transporting said film strip through said guide structure across said gap toward said filmthreading means; and directional discriminating means in said guide structure between said inlet and said outlet for delivering the leading end of said film strip to one of said paths, depending upon the direction taken by the film strip according to its curvature inside said guide structure.
Claim 2
Dependent Claim
134 words
In motion-picture equipment, in combination: a take-up reel provided with film-threading means for engaging the leading end of an oncoming film strip of indeterminate initial curvature; a guide structure for directing said film strip regardless of its curvature toward said film-threading means across an intervening gap, said guide structure having an inlet for said film strip and an outlet forming a plurality of differently oriented paths leading to said film-threading means; feed means for transporting said film strip through said guide structure across said gap toward said filmthreading means; and directional discriminating means in said guide structure between said inlet and said outlet for delivering the leading end of said film strip to one of said paths, depending upon the direction taken by the film strip according to its curvature inside said guide structure.
Claim 3
Dependent Claim
59 words
The combination defined in claim 1 wherein said guide structure is internally provided with at least two channels branching out from said inlet and with guide elements downstream of said discriminating means establishing a point of intersection of said channels, said discriminating means comprising at least one generally wedge-shaped deflector inserted between said channels and pointing toward said inlet.
Claim 4
Dependent Claim
24 words
The combination defined in claim 2 wherein said guide structure is provided with a set of rollers flanking said channels downstream of said deflector.
Claim 5
Dependent Claim
45 words
The combination defined in claim 3 wherein said rollers include two outer rollers and an inner roller, said inner roller having an axis upstream of a common axial plane of said outer rollers whereby the paths defined by said rollers intersect downstream of said rollers.
References Cited (Backward Citations)
GB893402A
Cited
US3722988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |