Patent EP0016488A1 successfully refreshed from Google Patents.
EP0016488A1
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EP
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A light-tight cassette
Assignee: Agfa Gevaert NV
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Filing: 1980-02-29
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Granted: —
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Expires: 2000-02-29
Abstract
Abstract A light-tight cassette for holding and dispensing a roll of light-sensitive material comprising an extrusion moulded shell and injection moulded end caps. Difficulties which may arise in fitting the end caps to the shell are avoided by providing the inner face of the end caps with axially projecting corner portions (26,27,28) having a three-dimensional form providing outwardly facing surfaces which are outwardly convexly curved both in radial planes containing the axis of the hub portion (44) of the cap and in planes normal to said axis. The said corner portions fit inside corner regions of the shell and have a self-centralizing effect if the caps and shell are pushed together in abaxial and/or relatively angularly skewed relationship.
Inventors
- 👤 Edward Buelens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 03:59
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587; G03B27/588
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
197 words
A light-tight cassette for holding and dispensing a roll of light-sensitive material, said cassette being in the form of a rectanguloid box comprising a four-sided shell with end closure walls having central hub portions for rotatably supporting a said roll within the box, the shell having a peripheral exit slot through which light-sensitive material can be drawn from a said roll and at least one of said end walls being formed by an end cap which has spaced inner and outer peripheral wall portions defining a peripheral groove for receiving an end portion of the shell and which at corner portions thereof has axially p.rojecting guide portions which fit inside corner regions of an end of the shell and provide extensions of the inner face of the inner wall of such peripheral groove, characterised in that each of said guide portions has a three-dimensional form providing an outwardly facing surface which is outwardly convexly curved both in radial planes containing the axis of its hub portion and in planes normal to said axis whereby said guide portions produce a self-centralising effect when the cap and shell are pushed together in abaxial and/ or relatively angularly skewed relationship.
Claim 2
Dependent Claim
197 words
A light-tight cassette for holding and dispensing a roll of light-sensitive material, said cassette being in the form of a rectanguloid box comprising a four-sided shell with end closure walls having central hub portions for rotatably supporting a said roll within the box, the shell having a peripheral exit slot through which light-sensitive material can be drawn from a said roll and at least one of said end walls being formed by an end cap which has spaced inner and outer peripheral wall portions defining a peripheral groove for receiving an end portion of the shell and which at corner portions thereof has axially p.rojecting guide portions which fit inside corner regions of an end of the shell and provide extensions of the inner face of the inner wall of such peripheral groove, characterised in that each of said guide portions has a three-dimensional form providing an outwardly facing surface which is outwardly convexly curved both in radial planes containing the axis of its hub portion and in planes normal to said axis whereby said guide portions produce a self-centralising effect when the cap and shell are pushed together in abaxial and/ or relatively angularly skewed relationship.
Claim 3
Dependent Claim
28 words
A light-tight cassette according to claim 1, wherein there is a said axially projecting guide portion at three but not four corners of the or each said cap.
Claim 4
Dependent Claim
109 words
A light-tight cassette according to claim 1 or 2, having at least one said end cap which is a moulded plastics component having a corrugated cross-sectional profile which provides around the hub portion a series of radial ribs which project alternately at the internally facing and the externally facing side of the end wall of the cap, and wherein the shape of the cap also provides abutment faces against which ejector pins can press for ejecting the cap from a mould, said abutment faces being located at corner regions of the cap between internally projecting radial ribs and at a level which is within the height of such ribs.
Claim 5
Dependent Claim
40 words
A light-tight cassette according to claim 3, wherein each of said abutment faces is provided by a porticn of the end cap which is contiguous with a said axially projecting guide portion located at the corresponding corner cf the cap.
Claim 6
Dependent Claim
20 words
A light-tight cassette according to claim 4 or 5, wherein each of said abutment faces has a half circular shape.
Claim 7
Dependent Claim
63 words
A light-tight cassette according to any of claims 3 to 5, wherein the or each end cap has on its inner side a wall portion which extends between radial ribs at that side of the cap and across the path of any light travelling along the inside face of the end cape from an end of the said peripheral slot in the shell.
Claim 8
Dependent Claim
107 words
A light-tight cassette according to any preceding claim, wherein the exit slot for the photographic material is located at or in the vicinity of a corner of the shell and has inwardly directed lips defining an exit passage; at one corner of the or each cap there is no axially projecting guide portion and the inner one of the peripheral wall portions defining the peripheral groove in said cap is interrupted at that corner to provide a gap for accommodating the end portions of said lips; and the regions of said inner peripheral wall portion abreast of said gap have a height which decreases towards that gap.
Claim 9
Dependent Claim
24 words
A light-tight cassette according to any preceding claim, wherein the or each said end cap is secured to the shell, by means of staples.
Claim 10
Dependent Claim
21 words
A light-tight cassette according to any preceding claim, wherein the or each said end cap is an injection moulded polypropylene component.
Claim 11
Dependent Claim
17 words
A light-tight cassette according to any preceding claim, wherein the said shell is extrusion formed of polypropylene.
References Cited (Backward Citations)
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