Patent US3700186A successfully refreshed from Google Patents.
US3700186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic rewind device for web handling apparatus
Assignee: Eastman Kodak Co
•
Filing: 1971-06-29
•
Granted: 1972-10-24
•
Expires: 1991-06-29
Abstract
Abstract A device for effecting automatic rewind in a web handling apparatus of the type having means for rotatably supporting a hub having a web of strip material wound thereon with the innermost end of the web anchored to the hub so that at least a portion of the web extends substantially radially from the hub when the web has been completely unwound therefrom. The device includes drive means having a first condition for unwinding the web from the hub and a second condition for rotating the hub to rewind the web thereabout. A first sensing means is actuatable by an increase in tension of the web to close a first switch and a second sensing means is actuatable by a portion of the web extending radially from the core to close a second switch. The drive means is placed in its second condition to rewind the web onto the hub in response to the simultaneous closure of the first and second switches.
Inventors
- 👤 William L Burnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:24
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A device for effecting automatic rewind in a web handling apparatus of the type having (1) a housing, (2) means on said housing for rotatably supporting a hub having a web of strip material wound thereon with the innermost end of the web anchored to the hub, and (3) drive means having a first condition for unwinding the web from the hub and a second condition for rotating the hub to rewind the web thereabout, said device comprising first and second means for respectively sensing different physically detectable conditions indicative of the fact that the web has been completely unwound from said hub, said first and second means being operatively connected to said drive means for placing said drive means in its second condition when both of said conditions have been sensed by said first and second means substantially simultaneously.
Claim 2
Independent Claim
140 words
A device for effecting automatic rewind in a web handling apparatus of the type having (1) a housing, (2) means on said housing for rotatably supporting a hub having a web of strip material wound thereon with the innermost end of the web anchored to the hub, and (3) drive means having a first condition for unwinding the web from the hub and a second condition for rotating the hub to rewind the web thereabout, said device comprising first and second means for respectively sensing different physically detectable conditions indicative of the fact that the web has been completely unwound from said hub, said first and second means being operatively connected to said drive means for placing said drive means in its second condition when both of said conditions have been sensed by said first and second means substantially simultaneously.
Claim 3
Independent Claim
227 words
A device for effecting automatic rewind in a web handling apparatus of the type having (1) a housing, (2) means on said housing for rotatably supporting a hub having a surface upon which a web of strip material may be wound with the innermost end of the web anchored to the hub so that least a portion of the web extends substantially radially from the hub when the web has been completely unwound therefrom, and (3) drive means having a first condition for unwinding the web from the hub and a second condition for rotating the hub to rewind the web thereabout, said device comprising: a first member mounted on said housing for movement between a first position and a second position; means resiliently urging said first member toward its first position; means for moving said first member to its second position in response to an increase in the tension of the web; a second member mounted on said housing for movement between a first position and a second position; means resiliently urging said second member toward its first position; means actuatable by said portion of the web extending radially from the hub for moving said second member to its second position; and means responsive to said first and second member being in their respective second positions simultaneously for placing said drive means in its second condition.
Claim 4
Independent Claim
227 words
A device for effecting automatic rewind in a web handling apparatus of the type having (1) a housing, (2) means on said housing for rotatably supporting a hub having a surface upon which a web of strip material may be wound with the innermost end of the web anchored to the hub so that least a portion of the web extends substantially radially from the hub when the web has been completely unwound therefrom, and (3) drive means having a first condition for unwinding the web from the hub and a second condition for rotating the hub to rewind the web thereabout, said device comprising: a first member mounted on said housing for movement between a first position and a second position; means resiliently urging said first member toward its first position; means for moving said first member to its second position in response to an increase in the tension of the web; a second member mounted on said housing for movement between a first position and a second position; means resiliently urging said second member toward its first position; means actuatable by said portion of the web extending radially from the hub for moving said second member to its second position; and means responsive to said first and second member being in their respective second positions simultaneously for placing said drive means in its second condition.
Claim 5
Dependent Claim
89 words
A device as defined in claim 2 wherein said second member comprises: means for guiding that portion of the web which is being unwound from said hub, said guide means being spaced from said hub supporting means; a lever having a portion disposed between said guide means and said hub supporting means in such position that said lever portion (1) is bypassed by said web portion when it extends tangentially from said hub and (2) is engaged by said web portion when such portion extends radially from said core.
Claim 6
Dependent Claim
79 words
A device as defined in claim 3 wherein said lever is mounted on said housing for movement between a first position whereat said lever portion would interfere with said web portion extending radially from said hub toward said guide means and a second position whereat said lever portion is out of the path of said web portion when said web portion extends radially from said hub, and further comprising spring means for urging said lever toward its first position.
Claim 7
Dependent Claim
40 words
A device as defined in claim 4 wherein said means for placing said drive means in its second condition comprises means for detecting movement of said lever to its second position and for creating an electrical signal in response thereto.
Claim 8
Independent Claim
202 words
A device for effecting automatic rewind in a web handling apparatus of the type having (1) a housing, (2) means on said housing for rotatably supporting a hub upon which a web having opposed surfaces may be wound with the innermost end of the web anchored to the hub so that at least a portion of the web extends substantially radially from the hub when the web has been completely unwound therefrom, (3) means on said housing for defining a guide path for the web unwound from the hub, (4) means for advancing the web along said guide path from the hub and (5) means actuatable for rotating the hub to rewind the web thereabout, said device comprising: first sensing means engageable by one surface of the web and actuatable by an increase in the tension of the web between the hub and said web advancing means above a predetermined value for producing a first signal; second sensing means engageable by the other surface of the web and actuatable by said portion of the web extending radially from the hub for producing a second signal; and means responsive to said first and second signals occurring substantially simultaneously for actuating said rewind means.
Claim 9
Independent Claim
202 words
A device for effecting automatic rewind in a web handling apparatus of the type having (1) a housing, (2) means on said housing for rotatably supporting a hub upon which a web having opposed surfaces may be wound with the innermost end of the web anchored to the hub so that at least a portion of the web extends substantially radially from the hub when the web has been completely unwound therefrom, (3) means on said housing for defining a guide path for the web unwound from the hub, (4) means for advancing the web along said guide path from the hub and (5) means actuatable for rotating the hub to rewind the web thereabout, said device comprising: first sensing means engageable by one surface of the web and actuatable by an increase in the tension of the web between the hub and said web advancing means above a predetermined value for producing a first signal; second sensing means engageable by the other surface of the web and actuatable by said portion of the web extending radially from the hub for producing a second signal; and means responsive to said first and second signals occurring substantially simultaneously for actuating said rewind means.
Claim 10
Dependent Claim
104 words
A device as defined in claim 6 wherein said second sensing means comprises: means for guiding that portion of the web which is being unwound from said hub, said guide means being spaced from said hub supporting means; and detecting means responsive to movement of said web portion to said radial position for producing said second signal, said detecting means being disposed between said guide means and said hub supporting means in such position that it is bypassed by said web portion when it extends tangentially from said hub and is engaged by said web portion when such portion extends radially from said hub.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |