Severing by tearing or breaking – Breaking or tearing apparatus – Combined with preliminary weakener or with nonbreaking cutter
Patent
1988-06-15
1990-07-10
Phan, Hien H.
Severing by tearing or breaking
Breaking or tearing apparatus
Combined with preliminary weakener or with nonbreaking cutter
225103, C03B 3303
Patent
active
049401769
ABSTRACT:
An apparatus for cutting a workpiece of glass, ceramic, or like material on a surface of which an incised cutting line has been formed beforehand has a backing roller made of an acrylic resin on which the workpiece is laid so that the incised line is in contact with the backing roller, a pressure applying roller with an annular pressure applying rim around its outer cylindrical surface for applying localized pressing force on the surface of the workpiece directly opposite the incised line, and a feeding mechanism for feeding the workpiece, thus pressed between the pressure applying rim and the backing roller, in the direction of the incised line, whereby the localized pressing force is applied over the entire length of the incised line. The localized pressing force creates a bending moment in the workpiece, producing a tension stress which becomes a maximum along the incised line, whereby the workpiece fractures and is thereby cut along the section in which incised line lies.
REFERENCES:
patent: 3542266 (1970-11-01), Woelfle
patent: 3559855 (1971-02-01), Barnett et al.
patent: 4018372 (1977-04-01), Insolio
patent: 4046300 (1977-09-01), Welker
patent: 4420106 (1983-12-01), Hyatt
patent: 4775085 (1988-10-01), Ishizuka et al.
Saeki Kunio
Sato Yasuo
Meller Michael N.
Phan Hien H.
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