Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1990-10-16
1992-05-05
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
2642098, 26421112, 264564, 425141, 425162, 4253261, 425377, 425381, 425466, B29C 4716, B29C 4792
Patent
active
051105187
ABSTRACT:
A foil-blowing apparatus has at least one deformable lip defining the annular orifice from which the thermoplastic tube which is blown to form the coil is extruded. The lip can be provided with an array of effectors which, in response to a thickness-profile measuring unit, can radially deform the lip to correct thickness errors. The lip can be under prestress and the radial deformation is effected by measuring the thickness and superimposing a radial force on the prestress.
REFERENCES:
patent: 3988582 (1976-10-01), Harman
patent: 4339404 (1982-07-01), Upmeier et al.
patent: 4351785 (1982-09-01), Upmeier et al.
patent: 4594063 (1986-06-01), Reifenhauser et al.
patent: 4741686 (1988-05-01), Cazzani et al.
Dubno Herbert
Reifenhauser GmbH & Co. Maschinenfabrik
Tentoni Leo B.
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