US 6,136,417 A · Corrugator and corrugated fiberboard sheet manufacturing method

Abstract

The present invention relates to a corrugator and corrugated fiberboard sheet manufacturing method which are capable of accurately adjusting the quantity of moisture included in a sheet to certainly suppress the warp deformation of the sheet with the passage of time. The corrugator has an adhering section equipped with a plurality of pressurizing units separately disposed in series along a sheet conveying direction, where a front linerboard and a rear linerboard are adhered to each other to form a corrugated fiberboard sheet and the corrugated fiberboard sheet formed in the adhering section is processed into a predetermined configuration in a processing section standing on the downstream side of the adhering section. The corrugator comprises sensors placed on the upstream side of the processing section for detecting moisture content conditions of the front linearboard and the rear linerboard, respectively, moisturizing units provided on the upstream side of the sensors and on the downstream side of the adhering section for directly supplying moisture to surfaces of the front linerboard and the rear linerboard and a controller for setting moisture quantities to be supplied from said moisturizing units on the basis of detection information from said sensors.

Claims24

Dependent claims

A corrugator apparatus having an adhering section equipped with a plurality of pressurizing units separately disposed in series along a sheet conveying direction, where a front linerboard and a rear linerboard are adhered to each other to form a corrugated fiberboard sheet and said corrugated fiberboard sheet formed in said adhering section is processed into a predetermined configuration in a processing section standing on the downstream side of said adhering section, said corrugator apparatus comprising:

a sensor system placed on the upstream side of said processing section for detecting a moisture content level of each of said front linerboard and said rear linerboard;
a first moisturizer provided on the upstream side of said sensor system and on the downstream side of the adhering section for directly supplying amounts of additional moisture to a surface of each of said front linerboard and said rear linerboard;
and
a controller for setting said amounts of additional moisture to be supplied from said first moisturizer on the basis of said detected moisture content level obtained by said sensor system.

1 more element

A corrugated fiberboard sheet manufacturing method of producing a corrugated fiberboard sheet by adhering a front linerboard to a rear linerboard in an adhering section including a plurality of pressurizing units separately disposed in series along a sheet conveying direction and further of processing said corrugated fiberboard sheet produced in said adhering section into a predetermined configuration in a processing section, said corrugated fiberboard sheet manufacturing method comprising the steps of:

detecting a moisture content level of each of said front linerboard and said rear linerboard on the upstream side of said processing section through the use of a sensor system;
setting amounts of additional moisture to be supplied to a surface of each of said front linerboard and said rear linerboard on the basis of the moisture content level detected through said sensor system;
and
supplying the set amounts of additional moisture on the upstream side of said sensor system and on the downstream side of said adhering section through the use of a first moisturizer.

1 more element

A corrugated fiberboard sheet manufacturing method of heating, cooling and adhering a front linerboard and a rear linerboard in an adhering section including a heating section and a cooling section to form a corrugated fiberboard sheet, with said corrugated fiberboard sheet formed in said adhering section being processed into a predetermined configuration in a processing section, said corrugated fiberboard sheet manufacturing method comprising the steps of:

detecting a moisture content level of each of said front linerboard and said rear linerboard by a sensor system between said processing section and said cooling section;
setting amounts of additional moisture to be supplied to a surface of each of said front linerboard and said rear linerboard on the basis of the moisture content level detected by said sensor system;
and
supplying the set amounts of additional moisture through a first moisturizer on the upstream side of said sensor system and on the downstream side of said adhering section.

1 more element

Dependencies are inferred from the claim text.

Corrugator and corrugated fiberboard sheet manufacturing method

Life of this patent

Corrugator and corrugated fiberboard sheet manufacturing method

Life of this patent

Abstract

Claims24