Patent US5488480A successfully refreshed from Google Patents.
US5488480A
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Apparatus and method for detecting a heat seal in a moving plastic film
Assignee: CMD Corp
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Filing: 1994-02-16
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Granted: 1996-01-30
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Expires: 2014-02-16
Abstract
Abstract An apparatus and method are provided for detecting a formation or change in the consistency of a moving sheet material. The apparatus includes a radiation source, a radiation receiver, a support base for the sheet material, and a signal processor for producing a signal in response to the detection of a formation in the material. The apparatus may be modified to include moving or stationary support bases, and may be further modified to include structure for automatically positioning the source and receiver to optimize the detection of formations.
Inventors
- 👤 Stephen A. Saindon
- 👤 Kevin O. Heindel
- 👤 James G. Morrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:50
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B26; B26D; B26D5/00; B26D5/20; B26D5/22; B26D5/30; B26D5/34; B29C65/00; B29C65/02; B29C65/18; B29C65/78; B29C65/7858; B29C65/7879; B29C65/7882; B29C65/7885; B29C65/7888; B29C65/7894; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/431; B29C66/4312; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81463; B29C66/81465; B29C66/83; B29C66/834; B29C66/8341; B29C66/83421; B29C66/8351; B29C66/83511; B29C66/83517; B29C66/84; B29C66/841; B29C66/8412; B29C66/851; B29C66/8511; B29C66/90; B29C66/96; B29C66/961; B29C66/98; G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; B29C2793/00; B29C2793/009; B29C2795/00; B29C2795/002; B29C66/70; B29C66/71; B29C66/82; B29C66/822; B29C66/8221; B29C66/8223; B29C66/824; B29C66/8242; B29C66/93; B29C66/932; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; B31; B31B; B31B50/00; B31B50/006
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
152 words
An arrangement for detecting a heat seal in a film moving in a predetermined direction of travel comprising: a support surface disposed to support the moving film at an interface between the surface and the film; means, adjacent the interface, for directing radiation toward the interface along a line substantially parallel to a heat seal of interest and substantially perpendicular to the direction of travel, a portion of the radiation being reflected by the film at a varying intensity; means, adjacent the interface, for receiving the portion of the radiation reflected by the film along the line; means for producing a signal representative of the intensity of the portion of the radiation; and selectively adjustable means for monitoring the signal and for selectively detecting the heat seal in the moving film oriented substantially perpendicular to the direction of travel in response to changes in the intensity of the portion of the radiation.
Claim 2
Dependent Claim
152 words
An arrangement for detecting a heat seal in a film moving in a predetermined direction of travel comprising: a support surface disposed to support the moving film at an interface between the surface and the film; means, adjacent the interface, for directing radiation toward the interface along a line substantially parallel to a heat seal of interest and substantially perpendicular to the direction of travel, a portion of the radiation being reflected by the film at a varying intensity; means, adjacent the interface, for receiving the portion of the radiation reflected by the film along the line; means for producing a signal representative of the intensity of the portion of the radiation; and selectively adjustable means for monitoring the signal and for selectively detecting the heat seal in the moving film oriented substantially perpendicular to the direction of travel in response to changes in the intensity of the portion of the radiation.
Claim 3
Dependent Claim
16 words
The arrangement of claim 1, wherein the support surface includes the surface of a rotatable roller.
Claim 4
Dependent Claim
11 words
The arrangement of claim 1, wherein the support surface is stationary.
Claim 5
Dependent Claim
28 words
The arrangement of claim 1, wherein the means for directing and the means for receiving are light wave guides disposed at predetermined orientations with respect to the film.
Claim 6
Dependent Claim
14 words
The arrangement of claim 4, further comprising means for controllably adjusting the predetermined orientations.
Claim 7
Dependent Claim
56 words
The arrangement of claim 5, wherein the means for controllably adjusting comprises: a first stepping motor disposed to support the means for directing and adjust its orientation; a second stepping motor disposed to support the means for receiving and adjust its orientation; and means for controllably providing electrical power to the first and second stepping motors.
Claim 8
Dependent Claim
62 words
The arrangement of claim 1, wherein the means for producing and for selectively detecting comprises: an infrared light source disposed to apply infrared light radiation to the means for directing; and a circuit disposed to receive the portion of the radiation, the signal being normally biased toward a first state and changing to a second state in response to the heat seal.
Claim 9
Dependent Claim
158 words
An arrangement for detecting a heat seal in a plastic film moving in a predetermined direction of travel comprising: a support surface disposed to support the moving plastic film at an interface between the surface and the film; a first light guide positioned to direct light toward the interface along a line substantially parallel to the heat seal in the film and substantially perpendicular to the direction of travel, a portion of the light being reflected by the film at varying intensity; a second light guide positioned to receive the portion of the light reflected by the film along the line; and an interface circuit coupled to the first and second light guides, the interface circuit producing a signal representative of the intensity of the light reflected by the film, the interface circuit being adjustable for selectively detecting the heat seal in the film oriented substantially perpendicular to the path of travel based upon changes in the signal.
Claim 10
Dependent Claim
158 words
An arrangement for detecting a heat seal in a plastic film moving in a predetermined direction of travel comprising: a support surface disposed to support the moving plastic film at an interface between the surface and the film; a first light guide positioned to direct light toward the interface along a line substantially parallel to the heat seal in the film and substantially perpendicular to the direction of travel, a portion of the light being reflected by the film at varying intensity; a second light guide positioned to receive the portion of the light reflected by the film along the line; and an interface circuit coupled to the first and second light guides, the interface circuit producing a signal representative of the intensity of the light reflected by the film, the interface circuit being adjustable for selectively detecting the heat seal in the film oriented substantially perpendicular to the path of travel based upon changes in the signal.
Claim 11
Dependent Claim
14 words
The arrangement of claim 8, wherein the support surface includes a rotatable roller surface.
Claim 12
Dependent Claim
11 words
The arrangement of claim 8, wherein the support surface is stationary.
Claim 13
Dependent Claim
66 words
The arrangement of claim 8, wherein the interface circuit comprises: an infrared light source disposed to apply light in the form of infrared light to the first light guide; and a circuit disposed to receive the portion of the light reflected from the second light guide, where the signal is normally biased toward a first state and takes a second state in response to the seal.
Claim 14
Dependent Claim
24 words
The arrangement of claim 8, further comprising means for controllably adjusting orientations of the first and second light guides with respect to the film.
Claim 15
Dependent Claim
56 words
The arrangement of claim 12, wherein the means for controllably adjusting comprises: a first stepping motor disposed to support the first light guide and adjust its position; a second stepping motor disposed to support the second light guide and adjust its position; and means for controllably providing electrical power to the first and second stepping motors.
Claim 16
Independent Claim
119 words
A method for detecting a heat seal in a plastic film moving in a predetermined direction of travel comprising the steps of: (a) supporting said moving film on a support surface; (b) emitting radiation toward said moving film on said support surface along a line substantially parallel to said seal and substantially perpendicular to the direction of travel to reflect a portion of said radiation from said film; (c) receiving said portion of said radiation reflected by said film along the line; (d) producing a first signal representative of said portion of said radiation; and (e) monitoring said first signal and selectively producing a second signal indicating detection of said seal in response to changes in said first signal.
Claim 17
Independent Claim
119 words
A method for detecting a heat seal in a plastic film moving in a predetermined direction of travel comprising the steps of: (a) supporting said moving film on a support surface; (b) emitting radiation toward said moving film on said support surface along a line substantially parallel to said seal and substantially perpendicular to the direction of travel to reflect a portion of said radiation from said film; (c) receiving said portion of said radiation reflected by said film along the line; (d) producing a first signal representative of said portion of said radiation; and (e) monitoring said first signal and selectively producing a second signal indicating detection of said seal in response to changes in said first signal.
Claim 18
Dependent Claim
15 words
The method as set forth in claim 14, further comprising the step of producing radiation.
Claim 19
Dependent Claim
43 words
The method as set forth in claim 14; wherein step (e) includes normally biasing said second signal toward a first state and altering said second signal to a second state in response to a change in said first signal caused by said seal.
Claim 20
Dependent Claim
63 words
The method as set forth in claim 14, wherein said radiation is emitted by an emitter having a first predetermined orientation with respect to said film and said portion of said radiation is received by a receiver having a second predetermined orientation with respect to said film, and wherein said method further comprises the step of selectively controlling said first and second orientations.
Claim 21
Dependent Claim
28 words
The method as set forth in claim 17, wherein said first and second orientations are selectively controlled by stepping motors in response to signals from a control unit.
References Cited (Backward Citations)
US3125265A
Cited
US2866376A
Cited
US3206606A
Cited
US3589817A
Cited
US3992111A
Cited
US4233346A
Cited
US4431309A
Cited
JPS56101893A
Cited
US4945252A
Cited
US4642084A
Cited
US4671663A
Cited
JPS62163950A
Cited
US5095214A
Cited
US4972088A
Cited
US4934993A
Cited
US5301129A
Cited
US5184190A
Cited
US5260766A
Cited
US5386293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-29 | 1999-07-31 | 2000-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-29 | 2003-07-31 | 2004-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-29 | 2007-07-31 | 2008-01-30 | $7700.00 | Window Closed / Lapsed |