Process and calender for the production of packing sheets

Details Process and calender for the production of packing sheets Process and calender for the production of packing sheets

1991-10-01

1993-08-17

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With step of cleaning, polishing, or preconditioning...

100 49, 100 93RP, 100168, 100170, 264 401, 264 404, 264175, 264310, 425141, 425232, 425367, 425162, B29C 4324, B29C 4346, B29C 4358

Patent

active

052366405

ABSTRACT:
A calendar for the production of packing sheets has a heated cylinder of large diameter on which a packing sheet is progressively built-up of layers of rubber-fiber mixture during many revolutions and the cylinder and an unheated counter pressure cylinder of smaller diameter mounted in slidable bearings for rotation and for movement toward and away from the heated cylinder. As the packing sheet is progressively built-up on the heated cylinder, its thickness is continuously measured by feeler rollers pressed lightly against the surface of the packing sheet and associated inductive sensors. In a comparison circuit, the values of thickness-indicating signals received from the sensors are compared with the sum of an initial zero value recorded before rubber-fiber mixture is applied to the circumference of the heated cylinder, and a predetermined desired value. When the value of the thickness indicating signal equals the sum of the zero value and the desired value, the calender is stopped.

REFERENCES:
patent: 1925904 (1933-09-01), Mayne
patent: 2072145 (1937-03-01), Wells
patent: 2424856 (1947-07-01), Schnuck
patent: 3788789 (1974-01-01), Matsumura
patent: 3844870 (1974-10-01), Donoghue
patent: 3866115 (1975-02-01), Lewis
patent: 5030079 (1991-07-01), Benzing, II
patent: 5048411 (1991-09-01), Siebert
patent: 5131323 (1992-07-01), Siebert
patent: 5141681 (1992-08-01), Ramm

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