US5003333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generating mechanism for a web-roll
Assignee: Eastman Kodak Co
•
Filing: 1990-04-09
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Granted: 1991-03-26
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Expires: 2010-04-09
Abstract
Abstract A pulse generating mechanism, for a photosensitive web-roll mounted for rotation within a light-tight cartridge, comprises a flange on the web-roll; a plurality of activating means on the flange that are equally spaced angularly from each other and radially from the flange center; and sensing means disposed outside the cartridge for sensing movement of each activating means therepast, upon incremental rotation of the flange and web-roll, and for generating pulses in response to said sensing for monitoring quantity of web remaining on the web-roll. Each activating means preferably comprises a ferromagnetic or electrically conductive element on the flange, and the sensing means preferably comprises a transducer for sensing presence of that element. The element can be a ferromagnetic or electrically conductive disc affixed to the flange or spaced bosses on a flange made of ferromagnetic or electrically conductive material.
Inventors
- 👤 Edgar G. Earnhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:08
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/60
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
118 words
A pulse generating mechanism for a photosensitive web-roll mounted within a light-tight cartridge for rotation about a rotational axis upon withdrawal of web material therefrom, said mechanism comprising: a flange on the web-roll for constraining the web, said flange having a center coincident with said rotational axis; a plurality of activating means on said flange, said activating means being angularly equally spaced from each other and radially equally spaced from said flange center; and sensing means outside the cartridge for sensing movement of each activating means therepast upon incremental rotation of said flange and web-roll about said rotational axis and for generating pulses in response to said sensing for monitoring quantity of web material remaining on the web-roll.
Claim 2
Dependent Claim
118 words
A pulse generating mechanism for a photosensitive web-roll mounted within a light-tight cartridge for rotation about a rotational axis upon withdrawal of web material therefrom, said mechanism comprising: a flange on the web-roll for constraining the web, said flange having a center coincident with said rotational axis; a plurality of activating means on said flange, said activating means being angularly equally spaced from each other and radially equally spaced from said flange center; and sensing means outside the cartridge for sensing movement of each activating means therepast upon incremental rotation of said flange and web-roll about said rotational axis and for generating pulses in response to said sensing for monitoring quantity of web material remaining on the web-roll.
Claim 3
Dependent Claim
22 words
A pulse generating mechanism as claimed in claim 1 wherein said plurality of activating means includes a like plurality of ferromagnetic elements.
Claim 4
Dependent Claim
27 words
A pulse generating mechanism as claimed in claim 2 wherein said plurality of activating means further includes a like plurality of bosses respectively supporting said ferromagnetic elements.
Claim 5
Dependent Claim
27 words
A pulse generating mechanism as claimed in claim 3 wherein said bosses respectively have flat top surfaces lying in a common plane and supporting said ferromagnetic elements.
Claim 6
Dependent Claim
40 words
A pulse generating mechanism as claimed in claim 2 wherein said flange is formed from a ferromagnetic material; and wherein said plurality of activating means further includes a like plurality of bosses of such material respectively composing said ferromagnetic elements.
Claim 7
Dependent Claim
25 words
A pulse generating mechanism as claimed in claim 5 wherein said bosses respectively have flat top surfaces presenting said ferromagnetic elements in a common plane.
Claim 8
Dependent Claim
23 words
A pulse generating mechanism as claimed in claim 1 wherein said plurality of activating means includes a like plurality of electrically conductive elements.
Claim 9
Dependent Claim
28 words
A pulse generating mechanism as claimed in claim 7 wherein said plurality of activating means further includes a like plurality of bosses respectively supporting said electrically conductive elements.
Claim 10
Dependent Claim
28 words
A pulse generating mechanism as claimed in claim 8 wherein said bosses respectively have flat top surfaces lying in a common plane and supporting said electrically conductive elements.
Claim 11
Dependent Claim
66 words
A pulse generating mechanism as claimed in claim 1 wherein the cartridge has an outer sidewall with inner and outer surfaces; wherein said flange has an outer side surface disposed in parallel, closely spaced relation to the sidewall inner surface; wherein said plurality of activating means includes a like plurality of ferromagnetic elements; and wherein said sensing means is mounted adjacent to the sidewall outer surface.
Claim 12
Dependent Claim
37 words
A pulse generating mechanism as claimed in claim 10 wherein said plurality of activating means further includes a like plurality of bosses respectively having flat top surfaces lying in a common plane and supporting said ferromagnetic elements.
Claim 13
Dependent Claim
51 words
A pulse generating mechanism as claimed in claim 10 wherein said flange is formed from a ferromagnetic material; and wherein said plurality of activating means further includes a like plurality of bosses of such material respectively having flat top surfaces that lie in a common plane and compose said ferromagnetic elements.
Claim 14
Dependent Claim
67 words
A pulse generating mechanism as claimed in claim 1 wherein the cartridge has an outer sidewall with inner and outer surfaces; wherein said flange has an outer side surface disposed in parallel, closely spaced relation to the sidewall inner surface; wherein said plurality of activating means includes a like plurality of electrically conductive elements; and wherein said sensing means is mounted adjacent to the sidewall outer surface.
Claim 15
Dependent Claim
38 words
A pulse generating mechanism as claimed in claim 10 wherein said plurality of activating means further includes a like plurality of bosses respectively having flat top surfaces lying in a common plane and supporting said electrically conductive elements.
Claim 16
Dependent Claim
149 words
A pulse generating mechanism for a photosensitive web-roll mounted within a light-tight cartridge for rotation about a rotational axis upon withdrawal of web material therefrom, said mechanism comprising: a flange on the web-roll for constraining the web, said flange being molded from a ferromagnetic filled plastic and having a center coincident with said rotational axis; a plurality of activating means including a like plurality of ferromagnetic elements on said flange, said activating means further including a like plurality of bosses of such plastic respectively composing said ferromagnetic elements, said bosses being angularly equally spaced from each other and radially equally spaced from said flange center; and sensing means outside the cartridge for sensing movement of each boss therepast upon incremental rotation of said flange and web-roll about said rotational axis and for generating pulses in response to said sensing for monitoring quantity of web material remaining on the web-roll.
Claim 17
Dependent Claim
149 words
A pulse generating mechanism for a photosensitive web-roll mounted within a light-tight cartridge for rotation about a rotational axis upon withdrawal of web material therefrom, said mechanism comprising: a flange on the web-roll for constraining the web, said flange being molded from a ferromagnetic filled plastic and having a center coincident with said rotational axis; a plurality of activating means including a like plurality of ferromagnetic elements on said flange, said activating means further including a like plurality of bosses of such plastic respectively composing said ferromagnetic elements, said bosses being angularly equally spaced from each other and radially equally spaced from said flange center; and sensing means outside the cartridge for sensing movement of each boss therepast upon incremental rotation of said flange and web-roll about said rotational axis and for generating pulses in response to said sensing for monitoring quantity of web material remaining on the web-roll.
Claim 18
Dependent Claim
25 words
A pulse generating mechanism as claimed in claim 15 wherein said bosses respectively have flat top surfaces presenting said ferromagnetic elements in a common plane.
Claim 19
Dependent Claim
197 words
A pulse generating mechanism for a photosensitive web-roll mounted within a light-tight cartridge for rotation about a rotational axis upon withdrawal of web material therefrom, said cartridge having an outer sidewall with inner and outer surfaces, said mechanism comprising: a flange on the web-roll for constraining the web, said flange being molded from a ferromagnetic filled plastic and having an outer side surface disposed in substantially parallel, closely spaced relation to the sidewall inner surface, and further having a center coincident with said rotational axis; a plurality of activating means including a like plurality of ferromagnetic elements on said flange, said activating means further including a like plurality of bosses of such plastic respectively having flat top surfaces that lie in a common plane and compose said ferromagnetic elements, said bosses being angularly equally spaced from each other and radially equally spaced from said flange center; and sensing means outside the cartridge mounted adjacent to the sidewall outer surface for sensing movement of each boss therepast upon incremental rotation of said flange and web-roll about said rotational axis and for generating pulses in response to said sensing for monitoring quantity of web material remaining on the web-roll.
Claim 20
Dependent Claim
197 words
A pulse generating mechanism for a photosensitive web-roll mounted within a light-tight cartridge for rotation about a rotational axis upon withdrawal of web material therefrom, said cartridge having an outer sidewall with inner and outer surfaces, said mechanism comprising: a flange on the web-roll for constraining the web, said flange being molded from a ferromagnetic filled plastic and having an outer side surface disposed in substantially parallel, closely spaced relation to the sidewall inner surface, and further having a center coincident with said rotational axis; a plurality of activating means including a like plurality of ferromagnetic elements on said flange, said activating means further including a like plurality of bosses of such plastic respectively having flat top surfaces that lie in a common plane and compose said ferromagnetic elements, said bosses being angularly equally spaced from each other and radially equally spaced from said flange center; and sensing means outside the cartridge mounted adjacent to the sidewall outer surface for sensing movement of each boss therepast upon incremental rotation of said flange and web-roll about said rotational axis and for generating pulses in response to said sensing for monitoring quantity of web material remaining on the web-roll.
References Cited (Backward Citations)
US4758851A
Cited
US4918485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |