Assembly and method for reducing foil wrinkles
AssigneeTetra Laval Holdings & Finance S.A.
InventorsUlrika Linné, Anders Kristiansson, Werner Haag, Toni Waber, Mattias Henriksson, Kurt Holm
Life of this patent
Estimating the term…
Abstract
An assembly of a support plate and an exit window foil for use in an electron beam generating device. The support plate is designed to reduce wrinkles in the foil. The foil is bonded to the support plate along a closed bonding line bounding an area in which the support plate is provided with a pattern of apertures and foil support portions alternately. When vacuum is created in the housing the pattern is adapted to form a topographical profile of the foil substantially absorbing any surplus foil. Another aspect involves a method in a filling machine for sterilizing a packaging material web.
Claims12
An assembly of a support plate and an exit window foil for use in an electron beam generating device, said support plate reducing wrinkles in said foil, which wrinkles may arise due to surplus foil arising in the assembly process, said foil being bonded to the support plate along a closed bonding line bounding an area in which the support plate is provided with apertures and foil support portions and in which area the foil is adapted to serve as a portion of a wall of a vacuum tight housing of the electron beam generating device,
- the support plate, within said area, is provided with a pattern of apertures and foil support portions alternately, which pattern, when vacuum is created in the housing, is being adapted to form a topographical profile of the foil substantially absorbing any surplus foil, wherein
- the absorption is made in such a way that a substantially dominant bending of the foil occurs in said apertures, the dominant bending being made around an axis directed substantially perpendicular to the bonding line in a plane of the support plate.
A method for reducing wrinkles in an exit window foil of an electron beam generating device, which wrinkles may arise due to surplus foil arising in the assembly process, said foil being bonded to a support plate along a closed bonding line bounding an area in which the support plate is provided with apertures and foil support portions and in which area the foil is adapted to serve as a portion of a wall of a vacuum tight housing of the electron beam generating device,
- the method comprising
- providing, within said area, a pattern of apertures and foil support portions alternately in the support plate, which pattern, when vacuum is created in the housing, is being adapted to form a topographical profile of the foil substantially absorbing any surplus foil, wherein
- the absorption is made in such a way that a substantially dominant bending of the foil occurs in said apertures, the dominant bending being made around an axis directed substantially perpendicular to the bonding line in a plane of the support plate.
An assembly of a support plate and an exit window foil for use in an electron beam generating device, the support plate reducing wrinkles in the foil, which wrinkles may arise due to surplus foil arising in the assembly process, the foil being bonded to the support plate along a close bonding line bounding an area in which the support plate is provided with apertures and foil support portions and in which area the foil is adapted to serve as a portion of a wall of a vacuum tight housing of the electron beam generating device,
- the area in which the support plate is provided with apertures and foil support portions including a central section and a side section disposed on the side of the central section,
- the support plate, within the central section and the side section, is provided with a pattern of apertures and foil support portions alternately, which pattern, when vacuum is created in the housing, is being adapted to form a topographical profile of the foil substantially absorbing any surplus foil, wherein
- the absorption is made in such a way that a substantially dominant bending of the foil occurs in the apertures, the dominant bending being made around an axis directed substantially perpendicular to the bonding line in a plane of the support plate in both the central section and the side section, and
- the foil support portions in the central section being substantially perpendicular to the foil support portions in the side section.
Dependencies are inferred from the claim text.