Method of making rolls with elastic covers
AssigneesSulzer Papertec Krefeld GmbH, Ferd. Jagenberg & Sohne GmbH & Co. KG
InventorPeter Svenka
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Abstract
A roll which has a metallic core and an elastomeric envelope is obtained by assembling the cover from a stack of discs each of which surrounds the core. In order to impart to the cover a desired elasticity, the discs contain a fibrous material and a plastic substance and are pressed against each other in the longitudinal direction of the core. The plastic substance is hardenable within an interval exceeding 48 hours. The pressing step is started with a delay following the step of placing the discs around the core such that the hardening begins prior to compressing and is terminated within an interval not less than 48 hours following the start of the pressing step.
Claims14
A method of making a roll having an elongated core and an elastic cover including a plurality of discs containing a fibrous material and a plastic substance which is hardenable within a time span exceeding 48 hours, comprising the steps of placing the discs of the cover next to each other around the core;
- and subjecting the thus obtained cover to a compressive stress in the longitudinal direction of the core, including starting the application of said compressive stress with a delay following the placing step such that the hardening of said plastic substance begins prior to said subjecting step and is terminated within an interval of more than 48 hours following the start of the processing step.
A method of making a roll having an elongated core and an elastic cover including a plurality of discs containing a fibrous material and a plastic substance which is hardenable within a time span exceeding 48 hours, comprising the steps of placing the discs of the cover next to each other around the core;
- and subjecting the thus obtained cover to a compressive stress in the longitudinal direction of the core, wherein carrying out of said subjecting step is at least substantially without heating of the plastic substance, including starting the application of said compressive stress with a delay following the placing step such that the hardening of said plastic substance begins prior to said subjecting step and is terminated after an interval of more than 48 hours following the start of the compressing step.
A method of making a roll having a elongated core and an elastic envelope including a plurality of discs containing a fibrous material and a plastic substance which is hardenable within a time span exceeding 48 hours, comprising the steps of placing the discs of the envelope next to each other around the core;
- and subjecting the thus obtained envelope to a compressive stress in the longitudinal direction of the core, including starting the application of said compressive stress with a delay following the placing step such that the hardening of said plastic substance begins prior to said subjecting step and is terminated after an interval of more than 48 hours following the start of the compressing step.
Dependencies are inferred from the claim text.