Claims
- 1. A system for tightly rolling up a web covering a surface with one end of the web anchored to said surface, comprising a core about which the web is rolled,
- means for rolling up the web into a roll about said core from the other end thereof in the direction of said one end, and
- means for tightening the roll turns about one another during roll-up,
- said tightening means comprising a closed-ended tube of flexible and unstretchable material partially filled with a fluid,
- said tube having a length substantially equal to the width of said web,
- said tube underlying the roll for supporting the same above the web which covers the surface, and
- said tube being in an intitial position beneath the roll such that the central axis of the tube is spaced in said direction from the central axis of the roll, and
- said tube being in a normal position beneath the roll such that said central axes lie in a plane perpendicular to the web which covers the surface,
- whereby during a rolling up of the web said tube shifts by rolling on itself from said initial to said normal positions for causing said roll to slip to thereby tighten the web, whereafter said tube rolls on itself in said direction together with the roll and serves to maintain a tight web.
- 2. The system according to claim 1, wherein said core includes an outwardly extending axle, said means for rolling up the web comprising a gear motor operatively coupled to said axle for rotation of said core.
- 3. The system according to claim 1, wherein said means for rolling up the web comprises a plurality of first, spaced straps wrapped about the outer periphery of the roll in the same direction of roll-up, and means for reeling up said straps to affect a rolling up of the web and for steering the roll said straps lying between the web and said surface.
- 4. The system according to claim 2, wherein said means for rolling up the web further comprises a plurality of first, spaced straps wrapped about the outer periphery of the roll in the same direction of roll-up, and means for reeling up said straps to affect a rolling up of the web and for steering the roll said straps lying between the web and said surface.
- 5. The system according to claim 2, further comprising a guide arm journalled at one end on said axle, said surface having a guide groove located outwardly of web, and a guide roller at the other end of said arm for engaging said groove to guide the roll therealong.
- 6. A system for unrolling a web without bulging from a wound web roll for covering a surface with one end of the web anchored thereto, comprising,
- a core about which the web is rolled, said core including an outwardly extending axle,
- a plurality of spaced straps disposed between individual turns of said wound web roll in the same direction of web winding,
- means for unwinding said straps from their wrapped condition to effect an unrolling of the web from said wound web roll,
- a gear motor operatively coupled with said axle, and means for powering said motor,
- said powering means being disconnected during unrolling whereby said motor serves (to retard rotation of said axle against unrolling to thereby effect a tightening of the web during unrolling.
- 7. The system according to claim 6, further comprising a guide arm journalled at one end on said axle, said surface having a guide groove located outwardly of said web, and a guide roller at the other end of said arm for engaging said groove to guide the roll therealong.
- 8. The system according to claim 1, further comprising means for unrolling the web without bulging from the roll for covering the surface, comprising
- a plurality of spaced straps disposed between individual turns of said roll in the same direction of web winding,
- means for unwinding said straps from their wrapped condition to effect an unrolling of the web from the wound roll,
- a gear motor operatively coupled with said axle, and means for powering said motor,
- said powering means being disconnected during unrolling whereby said motor serves to retard rotation of said axle against unrolling to thereby effect a tightening of the web during unrolling.
- 9. The system according to claim 3, further comprising a guide arm journalled at one end on said axle, said surface having a guide groove located outwardly of said web, and a guide roller at the other end of said arm for engaging said groove to guide the roll therealong.
- 10. The system according to claim 8, wherein said means for rolling up the web comprises said gear motor with said powering means operatively connected thereto.
RELATED APPLICATION
This application is a continuation-in-part of U.S. Pat. application Ser. No. 656,330 filed Oct. 1, 1984 now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2495482 |
Jun 1982 |
FRX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
656330 |
Oct 1984 |
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