Patent US4607442A successfully refreshed from Google Patents.
US4607442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide mount
Assignee: DESMARAIS & FRERE Ltd 2315 de la PROVICE LONGUEUIL QUEBEC CANADA J4G 1G4
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Filing: 1985-08-14
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Granted: 1986-08-26
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Expires: 2005-08-14
Abstract
Abstract An improved slide mount of the type comprising a flat rectangular pocket forming a slideway for receiving a standard slide film provided with two lateral rows of driving notches, a central window formed in the pocket and a deformable slot in communication with the slideway to allow the introduction of the slide film with its rows of notches perpendicular to the slot into the slideway. This slide mount is improved in that at least one sprocket is provided for inside the slideway so as to engage one of the notches of the film and lock the same inside the slideway. This sprocket is smaller in size than the notch it engages to let the film free to expand to a certain extent when subjected to the heat of a lamp.
Inventors
- 👤 Gerard Desmarais
- 👤 Claude Desmarais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:33
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/64
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
In a slide mount of the type comprising a flat rectangular pocket forming a slideway for receiving a standard slide film provided with two lateral rows of driving notches, a central window formed in said pocket and a deformable slot in communication with the slideway to allow introduction of the slide film into said slideway with the rows of notches of the film perpendicular to the slot, the improvement wherein at least one sprocket is provided for inside the slideway to engage one of the notches of the film to lock the same inside the slideway after introduction, said sprocket being smaller in size than the notch to let the film free to expand to a certain extent when subjected to the heat of a lamp.
Claim 2
Dependent Claim
126 words
In a slide mount of the type comprising a flat rectangular pocket forming a slideway for receiving a standard slide film provided with two lateral rows of driving notches, a central window formed in said pocket and a deformable slot in communication with the slideway to allow introduction of the slide film into said slideway with the rows of notches of the film perpendicular to the slot, the improvement wherein at least one sprocket is provided for inside the slideway to engage one of the notches of the film to lock the same inside the slideway after introduction, said sprocket being smaller in size than the notch to let the film free to expand to a certain extent when subjected to the heat of a lamp.
Claim 3
Dependent Claim
43 words
The improved slide mount of claim 1, wherein two rows of sprockets are provided for inside the slideway, the sprockets of one row being spaced apart to engage a corresponding number of notches of one of the row of notches of the film.
Claim 4
Dependent Claim
29 words
The improved slide mount of claim 2, wherein each sprocket has a wedge-shaped structure oriented so as not to interfere with the introduction of the film into the slideway.
Claim 5
Dependent Claim
25 words
The improved slide mount of claim 3, wherein the sprockets are punched in one of the pocket's surface along the sides of the central window.
Claim 6
Dependent Claim
20 words
The improved slide mount of claim 4, wherein each sprocket has a height smaller than the thickness of the slideway.
Claim 7
Dependent Claim
41 words
The improved slide mount of claim 4, wherein at least one sprocket is positioned in the slideway near the slot in order to engage the cut edge of the film and thus additionally prevent it from slipping out from the slideway.
Claim 8
Dependent Claim
50 words
The improved slide mount of claim 4, wherein at least one sprocket is positioned near the slot, in a corresponding recess that communicate with the pocket forming the slideway, in order to engage the cut edge of the film and thus additionally prevent it from slipping out from the slideway.
Claim 9
Dependent Claim
24 words
The improved slide mount of claim 7, wherein each sprocket has its end aligned with the corresponding side of the pocket forming the slideway.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |