Glass manufacturing – Processes – Reshaping or surface deformation of glass preform
Patent
1987-09-22
1989-11-21
Kellogg, Arthur
Glass manufacturing
Processes
Reshaping or surface deformation of glass preform
65107, 65273, 65289, C03B 23023
Patent
active
048819620
ABSTRACT:
The invention relates to a method of bending a glass sheet to be tempered as well as to a glass sheets bending and tempering apparatus. An array of conveyor rollers in a glass sheets bending and tempering section is adapted to be curved around an axis of curvature transverse to the traveling direction in a manner that, beginning from a horizontal plane, the plane of a roller line curves with a continuously diminishing radius of curvature until the final radius of curvature is reached. During the curving process, the tangent of the mid-portion of a curved conveyor section is maintained substantially in a horizontal plane. Thus, each point in a glass sheet curves substantially at the same rate over the entire glass sheet area and, hence, local rapid deformations do not occur. During the curving process, a glass sheet is maintained in motion by means of the rollers of a curved roller conveyor.
REFERENCES:
patent: 2223124 (1940-11-01), Owen
patent: 4540425 (1985-09-01), Bocelli et al.
patent: 4773925 (1988-09-01), Schultz
Kellogg Arthur
O/Y Kyro A/B Tamglass
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