Paperboard for use in water resistant packaging
OwnerRandall Bailey, William Lanierinventors
Life of this patent
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Abstract
A method of producing paperboard and cartons made therefrom is described incorporating a waterproof or water resistant coating applied to the interior of the carton except for areas intended for gluing. A coating material is applied to the surface of an applicator roll, and a portion of the coating material is then removed from the roll. Contact between a paperboard web and the roll transfers coating material to the web, creating a coated surface except for an uncoated stripe. A carton may be formed from the coated web with the uncoated portion of the carton cut from the uncoated strip.
Claims8
A method for producing a paperboard product having separate coated and uncoated areas, comprising the steps of:
- moving a substrate web over a rotating applicator roll so as to define a region of contact between said web and said roll;
- applying a coating material to the surface of said applicator roll at an application location remote from said region of contact;
- positioning a coating removal device adjacent said roll between said application location and said region of contact to remove a portion of said coating material from at least one area on said roll;
- whereby contact between said web and said roll transfers said coating material to said web, creating a coated surface except for a strip corresponding to the portion of said coating material removed from said roll.
A method for producing a paperboard product having separate coated and uncoated areas, comprising the steps of:
- extruding a coating material from an extruder having an elongated slot for said coating material to create a film of said coating material;
- blocking a portion of said slot to create a gap in said film of coating material;
- and
- applying said film of coating material to a substrate web to produce a coated substrate web with at least one uncoated area thereon.
A method for producing a paperboard carton blank, comprising the steps of:
- moving a substrate web over a rotating applicator roll so as to define a region of contact between said web and said roll;
- applying a coating material to the surface of said applicator roll at an application location remote from said region of contact;
- positioning a coating removal device adjacent said roll between said application location and said region of contact to remove a portion of said coating material from at least one area on said roll;
- whereby contact between said web and said roll transfers said coating material to said web, creating a coated surface except for a stripe corresponding to the portion of said coating material removed from said roll;
- cutting a carton blank from said web so that an uncoated area of said blank if formed from substrate located along said stripe.
Dependencies are inferred from the claim text.