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US 4,589,944 AGranted
Process and apparatus for producing a strip of corrugated cardboard
AssigneeS. A. Martin
InventorsMario Torti, Bernard Capdeboscq
Life of this patent
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Abstract
A process for producing a strip (4) of corrugated cardboard by gluing one or more sheets (8, 10) of single-face corrugated cardboard and a sheet (6) of covering paper. At least the corrugations of the upper sheet (10) are heated by means of an infra-red radiation panel (40), after the glue has been deposited on them in the gluer (1) and before the sheets come in contact with one another in the double-face machine (2).
Claims6
An apparatus for producing a strip of corrugated cardboard consisting of two sheets of corrugated paper and at least a sheet of covering paper comprising
- (a) a first machine (1) or gluer;
- (b) a second machine (2, 3) or double face which ensures that said sheets of paper are brought into contact;
- (c) a radiant panel (40) located between said two sheets of corrugated paper;
- (d) said panel being supplied with electrical power via at least one power variator device (46);
- (e) a processing device (51) controlling said power variator;
- (f) a first device (50) providing information to said processing device, said device measuring the temperature of the glue coated on the said corrugations;
- (g) a second device (52) measuring the quantity of glue deposited on the said corrugations;
- (h) a third device measuring the speed of passage of the cardboard in the machine;
- and
- (i) means to transmit information from said first, second and third devices to said processing device.
7 more elements
Dependencies are inferred from the claim text.