Plastic article or earthenware shaping or treating: apparatus – With safety feature
Patent
1993-10-21
1995-08-08
Mackey, James P.
Plastic article or earthenware shaping or treating: apparatus
With safety feature
74609, 100173, 226181, 267136, 425194, 425363, 425DIG45, 425DIG235, B29C 4324, B41F 3300, D21G 500
Patent
active
054393663
ABSTRACT:
A safety device for the roll space within a calender or other roll machine is disclosed. The rolls when rotating, excite oscillations in the beam at the resonant frequency of the beam. This can occur during start-up or during normal operation. The safety device of the present invention comprises a beam and additional mass that is oscillatorily suspended from the beam in order to reduce the amplitude of the beam oscillations at the beam resonant frequency. In addition, a damping element between additional mass and the beam is used to reduce any undesired oscillations due to newly created resonant frequencies introduced into the system.
REFERENCES:
patent: 2908456 (1959-10-01), Gertel
patent: 3085657 (1963-04-01), Preis
patent: 3435918 (1969-04-01), Chombard
patent: 4476969 (1984-10-01), Dykema
patent: 4807840 (1989-02-01), Baker et al.
patent: 5133115 (1992-07-01), Bock
patent: 5241903 (1993-09-01), Lampic
patent: 5263560 (1993-11-01), Bayer
"Kempe's Engineers Yearbook", 1987, Chapter B4, pp. 39-45.
Autrata Jochen
Conrad Hans-Rolf
Hille Albert
Kleinewefers GmbH
Mackey James P.
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