US3740467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for inspecting the appearance of products
Assignee: Toshiba Corp
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Filing: 1971-12-30
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Granted: 1973-06-19
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Expires: 1991-12-30
Abstract
Abstract An apparatus for inspecting the appearance of products is provided and includes an image pickup tube for photographing an image of a standard product whose appearance is complete and an image of a sample product whose appearance is to be inspected and for generating two video signals respectively corresponding thereto. Means are provided for delaying one of the two video signals which corresponds to either the standard product of the sample product. Further means are provided for comparing the delayed video signals corresponding to either the standard product or the sample product and the non-delayed video signals which correspond to the other of the two video signals to thereby obtain a comparison therebetween. In accordance with the comparison between the image signals of the standard product and the same of the sample product, it can be readily determined if the appearance of the sample product is the same or different from that of the standard product and accordingly whether a defect exists or not.
Inventors
- 👤 M Kubo
- 👤 Y Arimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/95; G01N21/956; G01N21/95607
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
116 words
An apparatus for inspecting the appearance of products comprising: an image pickup device for alternately photographing a standard product whose appearance is complete and a sample product whose appearance is to be inspected and for providing two video signals corresponding thereto; means for delaying one of the two video signals corresponding to one photograph of either said standard product or said sample product; means for comparing said delayed video signals and the remaining non-delayed video signals of said two video signals to thereby obtain a comparison therebetween; whereby in accordance with said comparison the appearance of said sample product is inspected to determine whether or not it is the same as that of said standard product.
Claim 2
Independent Claim
116 words
An apparatus for inspecting the appearance of products comprising: an image pickup device for alternately photographing a standard product whose appearance is complete and a sample product whose appearance is to be inspected and for providing two video signals corresponding thereto; means for delaying one of the two video signals corresponding to one photograph of either said standard product or said sample product; means for comparing said delayed video signals and the remaining non-delayed video signals of said two video signals to thereby obtain a comparison therebetween; whereby in accordance with said comparison the appearance of said sample product is inspected to determine whether or not it is the same as that of said standard product.
Claim 3
Dependent Claim
22 words
The inspecting apparatus according to claim 1, in which an optical interrupter is provided between said image pickup device and said products.
Claim 4
Dependent Claim
23 words
The inspecting apparatus according to claim 1, which further includes means for rotating said standard product and sample product with the same phase.
Claim 5
Independent Claim
243 words
An apparatus for inspecting the appearance of products comprising: means for rotating with the same phase a standard product whose appearance is complete and a sample product whose appearance is to be inspected; means for alternately photographing said standard product and said sample product; an optical interrupting means provided between said products and said image pickup device so as to allow images of said products to alternately enter into said image pickup device such that two video signals respectively corresponding to said standard product and said sample product are produced; a synchronizing signal generator for generating synchronizing signals for synchronizing said optical interrupting means; a sweep oscillator for generating sweep signals for said image pickup device; a gate signal generator having said sweep signals and said synchronizing signals applied thereto for generating gate signals; an AND gate having said gate signals and said two video signals from said image pickup device applied thereto for separating said two video signals into that of said standard product and that of said sample product; means for delaying one of said two video signals which corresponds to either said standard product or said sample product; means for comparing said delayed video signals and said other non-delayed video signals of said two video signals to obtain a comparison therebetween; whereby in accordance with said comparison the appearance of said sample product is inspected to determine whether or not it is the same as that of said standard product.
Claim 6
Independent Claim
243 words
An apparatus for inspecting the appearance of products comprising: means for rotating with the same phase a standard product whose appearance is complete and a sample product whose appearance is to be inspected; means for alternately photographing said standard product and said sample product; an optical interrupting means provided between said products and said image pickup device so as to allow images of said products to alternately enter into said image pickup device such that two video signals respectively corresponding to said standard product and said sample product are produced; a synchronizing signal generator for generating synchronizing signals for synchronizing said optical interrupting means; a sweep oscillator for generating sweep signals for said image pickup device; a gate signal generator having said sweep signals and said synchronizing signals applied thereto for generating gate signals; an AND gate having said gate signals and said two video signals from said image pickup device applied thereto for separating said two video signals into that of said standard product and that of said sample product; means for delaying one of said two video signals which corresponds to either said standard product or said sample product; means for comparing said delayed video signals and said other non-delayed video signals of said two video signals to obtain a comparison therebetween; whereby in accordance with said comparison the appearance of said sample product is inspected to determine whether or not it is the same as that of said standard product.
Claim 7
Dependent Claim
48 words
The inspecting apparatus according to claim 4, in which said gate signal generator comprises: a phase shifter whose input is connected to said synchronizing signal generator; a monostable multivibrator connected to the output of said phase shifter; and a bistable multivibrator connected to the output said monostable multivibrator.
Claim 8
Dependent Claim
24 words
The inspecting apparatus according to claim 4, in which said delaying means comprises a video tape recorder having separately arranged reading and writing heads.
Claim 9
Dependent Claim
16 words
The inspecting apparatus according to claim 4, in which said phase shifter comprises a monostable multivibrator.
Claim 10
Dependent Claim
28 words
The apparatus according to claim 4, in which is further comprIsed a means for displaying any defect of said sample product as determined in accordance with said comparison.
Claim 11
Dependent Claim
32 words
The inspecting apparatus according to claim 4, in which is further comprised an alarm means which is activated by a defect in said sample product as determined in accordance with said comparison.
Claim 12
Dependent Claim
54 words
The inspecting apparatus according to claim 4, in which said optical interrupting means comprises a circular plate having a plurality of light reflective portions and a plurality of light transparent portions that are alternately arranged at the peripheral portion thereof; said light reflective portions and said light transparent portions having a same constant width.
Claim 13
Dependent Claim
41 words
The inspecting apparatus according to claim 10, in which said synchronizing signal generator comprises a photoreceiving device and a photoemitting device each being arranged on opposite sides of said optical interrupting means so as to interpose said optical interrupting means therebetween.
References Cited (Backward Citations)
US2460350A
Cited
US3049588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |