Knife drum for machines for cross-cutting lines of material
AssigneeJagenberg Papiertechnik GmbH
InventorAlbrecht Blume
Life of this patent
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Abstract
A knife drum for a web cross-cutting machine has a generally cylindrical drum body centered on an axis and formed by inner and outer tubes. The inner tube is reinforced with fibers extending helicoidally of the axis at positive and negative angles of 30° to 60° crosswise of one another. The outer tube is fitted coaxially in direct engagement over the inner tube and is reinforced with fibers extending at an angle of less than 30° to the axis. It further is formed with a full-length radially outwardly open groove holding a blade holder in turn carrying a blade.
Claims11
A knife drum for a web cross-cutting machine, the drum comprising:
- a generally cylindrical drum body centered on an axis and formed by
- an inner annularly continuous tube reinforced with fibers extending helicoidally of the axis at positive and negative angles of 30° to 60° crosswise of one another and
- an outer annularly continuous tube fitted coaxially in direct engagement over the inner tube and reinforced with fibers extending at an angle of less than 30° to the axis, the outer tube being formed with a generally axially extending, radially outwardly open, and radially inwardly closed helicoidal groove;
- a helicoidal blade holder fixed in the groove;
- and
- a helicoidal blade secured in the blade holder.
Dependencies are inferred from the claim text.