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US 10,525,653 B2Granted
Plant and method for producing corrugated cardboard with gluing defect detector
AssigneeFosber S.p.A.
InventorMauro Adami
Life of this patent
Estimating the term…
Abstract
The plant includes a single facer for the production of a corrugated board. Video cameras detect any gluing defects or other defects of the corrugated cardboard. An image processing unit and a central control unit provide information about the detected defects and can act on one or more operating parameters of the plant.
Claims28
A plant for producing corrugated cardboard, comprising in combination:
- a single facer comprising:
- a first corrugating roller and a second corrugating roller co-acting with each other to corrugate a first cardboard sheet;
- a pressing member to glue the first cardboard sheet, corrugated by the first corrugating roller and the second corrugating roller, to a second smooth cardboard sheet and form a single-faced corrugated cardboard;
- a first unwinding device to feed the first cardboard sheet to the single facer;
- a second unwinding device to feed the second cardboard sheet to the single facer;
- a feeding path for the single-faced corrugated cardboard towards a series of hot plates;
- a third unwinding device to feed a third sheet of smooth cardboard to the series of hot plates, the third cardboard sheet being glued to the single-faced corrugated cardboard on said hot plates;
- a removing device for removing defective cardboard portions;
- a central control unit;
- a viewing system comprising:
- at least one video camera arranged along the feeding path downstream of the pressing member of the single facer, configured and arranged to acquire images of a first face of the cardboard;
- and an image processing unit, interfaced with the at least one video camera and configured to process images acquired by the at least one video camera and to detect defects in cardboard gluing or corrugating;
- a tracking system to track a defective cardboard portion up to the removing device.
10 more elements
A method for producing corrugated cardboard, comprising steps as follows:
- feeding a first cardboard sheet and a second cardboard sheet to a single facer;
- corrugating the first cardboard sheet to provide a first corrugated cardboard sheet and gluing the first corrugated cardboard sheet to the second cardboard sheet, forming a single-faced corrugated cardboard;
- feeding the single-faced corrugated cardboard and a third smooth cardboard sheet to a series of hot plates;
- gluing the single-faced corrugated cardboard to the third smooth cardboard sheet by said series of hot plates;
- acquiring, by at least one video camera, images of a first surface of the single-faced corrugated cardboard;
- detecting any gluing defects of the single-faced corrugated cardboard in a defective cardboard portion, by processing the images acquired by the at least one video camera;
- tracking the defective cardboard portion up to a removing device;
- removing the defective cardboard portion.
5 more elements
Dependencies are inferred from the claim text.