US3711205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inspection method and apparatus for detecting oversized apertures in relatively thin sheets of opaque material
Assignee: GTE Sylvania Inc
•
Filing: 1971-07-22
•
Granted: 1973-01-16
•
Expires: 1991-07-22
Abstract
Abstract An inspection method and apparatus for detecting oversized apertures in thin sheets of opaque material utilizing a light source positioned in an encasement means having a floor and a plurality of upstanding walls about the perimeter of the floor. Each of these walls has a ledge formed thereon for supporting a translucent enclosure member having a predetermined pattern of openings spaced therein. As a relatively thin sheet of apertured material is positioned on the surface of the enclosure member according to alignment pins on the surface, a comparator means, hingedly affixed to one side of the enclosure member and comprising a relatively thin sheet of transparent material having an opaque pattern formed thereon corresponding to the aperture pattern desired for the opaque material, is lowered to cover the opaque material. Oversized apertures are detected if light is emitted through the adjoining comparator means and opaque material.
Inventors
- 👤 A Tulk
- 👤 A Douglas
- 👤 I Ericson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:12
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
An apparatus for inspecting for oversized apertures in relatively thin sheets of opaque apertured material comprising: an encasement means having a light source located therein, said encasement means comprising a floor having an opening therein and a plurality of upstanding walls around the perimeter of said floor, each of said upstanding walls having a terminal means located thereon for seating a translucent enclosure member, said translucent enclosure member having a plurality of spaced openings established in a predetermined pattern therein and an alignment means located thereon for aligning one of said sheets of opaque apertured material as said sheet is positioned on said translucent enclosure member; and a comparator means hingedly affixed to said translucent enclosure member and formed to substantially cover said material, said comparator means having an opaque pattern formed thereon, said pattern corresponding to a pattern of apertures desired for said material.
Claim 2
Independent Claim
145 words
An apparatus for inspecting for oversized apertures in relatively thin sheets of opaque apertured material comprising: an encasement means having a light source located therein, said encasement means comprising a floor having an opening therein and a plurality of upstanding walls around the perimeter of said floor, each of said upstanding walls having a terminal means located thereon for seating a translucent enclosure member, said translucent enclosure member having a plurality of spaced openings established in a predetermined pattern therein and an alignment means located thereon for aligning one of said sheets of opaque apertured material as said sheet is positioned on said translucent enclosure member; and a comparator means hingedly affixed to said translucent enclosure member and formed to substantially cover said material, said comparator means having an opaque pattern formed thereon, said pattern corresponding to a pattern of apertures desired for said material.
Claim 3
Dependent Claim
67 words
The apparatus according to claim 1 in which said comparator means is retained against said material by a suction force created in said encasement means by a vapor extraction means located externally of said encasement means and joined to said opening in said floor of said encasement means, said suction force acting through said spaced openings in said translucent encLosure member and said apertures in said material.
Claim 4
Dependent Claim
43 words
The apparatus according to claim 1 in which each of said terminal means comprises a ledge formed along the internal upper portion of each of said upstanding walls and extending substantially the entire length of said internal upper portion of said upstanding wall.
Claim 5
Dependent Claim
41 words
The apparatus according to claim 1 in which said terminal means comprises a plurality of pins, a portion of said pins inserted into the internal portions of said upstanding walls at a predetermined distance from the upper edges of said walls.
Claim 6
Dependent Claim
38 words
The apparatus according to claim 1 in which said alignment means comprises a plurality of upstanding pins positioned in a pre-established pattern on said translucent enclosure member, said upstanding pins formed to engage corresponding indentations in said material.
Claim 7
Dependent Claim
42 words
The apparatus according to claim 1 in which said comparator means comprises a photographic transparency, said transparency having a plurality of opaque dots positioned on a sheet of pliable transparent material according to a pattern acceptable for said apertures in said material.
Claim 8
Dependent Claim
69 words
The apparatus according to claim 1 in which said translucent enclosure member has a slot formed therein which is positioned in said enclosure member in a manner so as to be partially covered by said material and said comparator means during inspection of said material, thereby enabling the operator of said apparatus to lift said material and said comparator means from said enclosure member after said inspection is completed.
Claim 9
Dependent Claim
24 words
The apparatus according to claim 1 in which said comparator means is hingedly affixed to one of said upstanding walls of said encasement means.
Claim 10
Dependent Claim
130 words
An inspection method for detecting oversized apertures in relatively thin sheets of opaque material having said apertures positioned therein according to a predetermined pattern, said method comprising: mutually aligning said predetermined pattern of apertures within one of said sheets of opaque material with a pre-established pattern of opaque dots on a sheet of transparent material, said pre-established pattern of opaque dots being formed in accordance with an acceptable aperture pattern, said aligning being accomplished by utilizing a suction force acting through said apertures in said opaque material and against said sheet of transparent material; providing a light source on one side of said mutually aligned aperture and opaque dot patterns; and inspecting the opposing side of said mutually aligned aperture and opaque dot patterns for light transmitted through said patterns.
Claim 11
Dependent Claim
130 words
An inspection method for detecting oversized apertures in relatively thin sheets of opaque material having said apertures positioned therein according to a predetermined pattern, said method comprising: mutually aligning said predetermined pattern of apertures within one of said sheets of opaque material with a pre-established pattern of opaque dots on a sheet of transparent material, said pre-established pattern of opaque dots being formed in accordance with an acceptable aperture pattern, said aligning being accomplished by utilizing a suction force acting through said apertures in said opaque material and against said sheet of transparent material; providing a light source on one side of said mutually aligned aperture and opaque dot patterns; and inspecting the opposing side of said mutually aligned aperture and opaque dot patterns for light transmitted through said patterns.
Claim 12
Dependent Claim
76 words
The method according to claim 9 which includes the additional step of forming said pre-established pattern of opaque dots on said sheet of transparent material by bringing a sheet of opaque material having a predetermined pattern of desired apertures positioned therein together with a sheet of photographic negative paper, exposing the negative paper through the opaque apertured material and photochemically removing the unexposed portions of negative material from said paper, said paper being of transparent material.
References Cited (Backward Citations)
US1135919A
Cited
US2689779A
Cited
US3299273A
Cited
US3514208A
Cited
US3614232A
Cited
US3617744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |