Method of and apparatus for preventing premature severing of sco

Details Method of and apparatus for preventing premature severing of sco Method of and apparatus for preventing premature severing of sco

1978-07-27

1980-04-08

Yost, Frank T.

Severing by tearing or breaking

Methods

With preliminary weakening

225 935, 225 965, B26F 306, C03B 3302

Patent

active

041968301

ABSTRACT:
A glass ribbon moves downstream under a pair of scoring wheels to score the bulb edges of the ribbon and thereafter past a cross scorer to laterally score the ribbon. As the ribbon moves further downstream the scores at the bulb edge move under (1) a plurality of hot airstreams which propagate the fissure depth of the score and (2) under a cold airstream to concentrate the stress field about the score line to prevent premature severing of the bulb edges due to mechanical vibrations generated during subsequent opening of the lateral score.

REFERENCES:
patent: 3486673 (1969-12-01), Madge
patent: 3730408 (1973-05-01), Dahlberg et al.
patent: 3795572 (1974-03-01), DeTorre
patent: 3800991 (1974-04-01), Grove et al.
patent: 3865673 (1975-02-01), DeTorre
patent: 3909226 (1975-09-01), McCourty et al.
patent: 3921873 (1975-11-01), Dahlberg et al.
patent: 4109841 (1978-08-01), DeTorre

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