Method for producing a two-piece paper container

• US 4,460,348 A
• Filed: 06/03/1981
• Issued: 07/17/1984
• Est. Priority Date: 06/09/1980
• Status: Expired due to Term

• Current Assignee: Nihon Dixie Company Limited
• Original Assignee: Nihon Dixie Company Limited
• Inventors: Suzuki, Shoichi, Iioka, Akira
• Primary Examiner(s): Coan, James F.
• Application Number:
  US06/270,091
• Time in Patent Office: 1,140 Days
• Field of Search: 156/218, 156/217, 156/308.2, 156/308.4, 156/256, 162/146, 162/224, 162/228, 493/108, 493/109, 493/133, 493/134, 493/394, 493/104, 493/102, 493/341
• US Class Current: 493/108
• CPC Class Codes: B31B 2105/00 Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
• CPC Class Codes: B31B 2120/00 Construction of rigid or semi-rigid containers
• CPC Class Codes: B31B 50/00 Making rigid or semi-rigid containers, e.g. boxes or cartons
• CPC Class Codes: B31B 50/742 Coating; Impregnating; Waterproofing; Decoating
• CPC Class Codes: Y10T 156/1038 Hollow cylinder article

Abstract

A method for producing two-piece paper containers having waterproofness, water repellency, permeability and good stiffness without using any adhesive. A container body wall member and a container bottom panel member are blanked out from a base paper made from a stock containing about 10 to about 80% by weight of high-density polyethylene synthetic pulp. The blanked members are fabricated into a container using a conventional cup-making machine without using any adhesive. Then, the so-fabricated containers are heated at a temperature between about 120° C. and about 300° C. for a short period of time.

Claims

1. A method for producing a two-piece container consisting of

blanking a container body wall member and a container bottom panel member from a base paper made of a stock containing about 10 to about 80% by weight of high-density polyethylene synthetic pulp;

fabricating the members into a container using a conventional cup-making machine; and

then increasing the water proofness, water-repellency or stiffness by heating the so-fabricated whole container at a temperature between 120°

C. and about 300°

C.

2. A method according to claim 1 wherein the members are fabricated into the container by only heat sealing without using any adhesive.

3. A method for producing a two-piece paper container which comprises:

heating a base paper to the extent that its heat-sealability is not impaired, said base paper being made of a stock containing about 10 to 80% by weight of high-density polyethylene synthetic pulp;

blanking a container body wall member and a container bottom panel member from the base paper;

fabricating the members into a container using a conventional cup-making machine; and

then increasing the water-proofness, water-repellency or stiffness by heating the so-fabricated whole container at a temperature between about 120°

C. and 300°

C.

4. A method according to claim 3 wherein the members are fabricated into the container only by heat sealing without using any adhesive.