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US 4,401,716 AGranted
Foam strip wound up into a roll, preferably for sealing purposes
AssigneeIrbit Holding AG
InventorRolf Tschudin-Mahrer
Life of this patent
Estimating the term…
Abstract
A strip of impregnated and compressed foam material with delayed restoration which is rolled up into a roll, preferably for purposes of sealing, and particularly for improved sealing, the broad side of the roll is provided with a liquid-impermeable layer which adheres to the flank sides of the strip and which is expandable corresponding to the amount of restoration and has a spiral-shaped separation line corresponding to the winding joint of the s
Claims15
A strip of impregnated and compressed foam material with delayed restorability, wound up into a roll, forming a strip winding joint, wherein
- said strip has side flanks and said roll defines broad sides comprising said side flanks, respectively, of the strip,
- a liquid-impervious layer at one of said broad sides of said roll adheres to a corresponding of said side flanks of the strip,
- said layer being expandable corresponding to the amount of restoration of the strip,
- said layer being tearable along a spiral-shaped line corresponding to said strip winding joint.
1 more element
Dependencies are inferred from the claim text.