Patent CA1068951A successfully refreshed from Google Patents.
CA1068951A
Expired / Lapsed
CA
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Photographic film slide frame
Assignee: BONUM-WERK INH FRIEDRICH HETZMANNSEDER
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Filing: 1976-11-10
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Granted: 1980-01-01
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Expires: 1996-11-10
Abstract
Abstract Abstract of the Disclosure A slide frame is comprised of two component frames snapped together to clamp a slide film therebetween. The slide film has perforations on opposite sides thereof and arranged to extend along two opposite parallel sides of a window defined by the slide frame, the perforations having edges remote from the parallel sides. Two film spreading bars are arranged between the joined component frames along the two opposite parallel sides for limited longitudinal displacement in the direction of the sides and each of the bars has teeth for interengaging with the perforations in the slide film. The spreading bars are held between the component frames with their teeth engag-ing the remote edges of the film perforations whereby the film is held against warping between the component frames.
Inventors
- 👤 Heinrich Hrabik
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-04 16:22
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/64
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
A slide frame comprising two component frames each defining a rectangular window having two opposite parallel sides and including means for joining the two component frames together to form the slide frame, the windows registering in the joined component frames, and the two joined com-ponent frames being adapted to clamp a slide film therebetween, the slide film having perforations on opposite sides thereof and arranged to extend along the two opposite parallel sides of the registering windows, and the perforations having edges remote from the parallel sides of the registering windows, two film spreading bars arranged between the two joined component frames along the two opposite parallel sides of the registering windows for limited longitudinal displacement in the direction of said sides, each of the bars having teeth for interengaging with the perforations in the slide film and clamping the slide film between the component frames to hold the film in a plane, and means for holding the spreading bars between the com-ponent frames with their teeth engaging the remote edges of the film per-forations whereby the film is held against warping between the component frames.
Claim 2
Dependent Claim
186 words
A slide frame comprising two component frames each defining a rectangular window having two opposite parallel sides and including means for joining the two component frames together to form the slide frame, the windows registering in the joined component frames, and the two joined com-ponent frames being adapted to clamp a slide film therebetween, the slide film having perforations on opposite sides thereof and arranged to extend along the two opposite parallel sides of the registering windows, and the perforations having edges remote from the parallel sides of the registering windows, two film spreading bars arranged between the two joined component frames along the two opposite parallel sides of the registering windows for limited longitudinal displacement in the direction of said sides, each of the bars having teeth for interengaging with the perforations in the slide film and clamping the slide film between the component frames to hold the film in a plane, and means for holding the spreading bars between the com-ponent frames with their teeth engaging the remote edges of the film per-forations whereby the film is held against warping between the component frames.
Claim 3
Dependent Claim
18 words
The slide frame of claim 1, wherein the two opposite parallel sides are longitudinal sides of the windows.
Claim 4
Dependent Claim
87 words
The slide frame of claim 1, wherein the means for holding the spreading bars comprises a recess along a respective one of the sides in one of the component frames for receiving a respective one of the spreading bars, the recess having a camming surface sloping away from the one side, and the one spreading bar has a camming surface cooperating with the camming surface of the recess whereby the one spreading bar is forced away from the one side when the two component frames are joined.
Claim 5
Dependent Claim
47 words
The slide frame of claim 1, wherein the teeth of at least one of the spreading bars have a root portion and a side face remote from an associated one of the parallel sides, the remote side face having a portion sloping away from the one side.
Claim 6
Dependent Claim
29 words
The slide frame of claim 4, wherein the root portion of the teeth has a face remote from the one side extending perpendicularly to the plane of the film.
References Cited (Backward Citations)
No citation records indexed.
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