Method for producing a container

• US 4,070,953 A
• Filed: 06/10/1976
• Issued: 01/31/1978
• Est. Priority Date: 04/21/1975
• Status: Expired due to Term

• Current Assignee: SealRight Co., Inc. (Huhtamaki Oyj)
• Original Assignee: Phillips Petroleum Company (ConocoPhillips)
• Inventors: Taylor, Raymond C., Richards, Frank P.
• Primary Examiner(s): Coan, James F.
• Application Number:
  US05/694,619
• Time in Patent Office: 600 Days
• Field of Search: 93/1 D, 93/1.3, 93/36 B, 93/39.1 R, 93/39.1 P, 93/39 C, 93/36.5 R, 93/39.2, 93/39.3, 93/55.1 R, 93/55.1 P, 93/55.1 M, 93/59 R , 93/59 PL
• US Class Current: 493/109
• CPC Class Codes: B31B 2105/0022 Making boxes from tubular webs or blanks, e.g. with separate bottoms, including tube or bottom forming operations
• CPC Class Codes: B31B 50/28 around mandrels, e.g. for forming bottoms
• CPC Class Codes: B31B 50/592 using punches or dies
• CPC Class Codes: B31D 1/005 making bottoms or caps

Abstract

A container having a sidewall secured to a bottom member which has a bottom panel with a plurality of spaced apart fold lines between same and a depending skirt. The apparatus includes an arrangement for forming the bottom member from a blank with the apparatus including a forming die through which the blank is passed by use of a plunger arrangement with the die having a plurality of different size forming areas which cooperate with the plunger arrangement to form the fold lines and skirt. Means feed the blanks to the die and plunger arrangement for forming after which the bottom member is secured to the sidewall to form a container.

Claims

1. A method of forming a container, said method including the steps of:

a. feeding a blank to forming means having a forming die with a through bore with a plurality of different sized forming areas;

b. forming a first fold line on said blank by passing same through one of the forming areas;

c. forming a second fold line on said blank by passing same through another one of the forming areas whereby said blank is formed into a bottom member having a bottom panel portion and a depending skirt portion with said first and second fold lines therebetween with said fold lines being generally concentric;

d. reducing the diameter of the first fold line to a diameter less than the formed diameter of the first fold line;

e. moving the skirt portion into engagement with a sidewall and allowing the diameter of the first fold line to expand from the reduced size; and

f. securing said bottom member skirt portion to an interior surface of said sidewall by adhesion to form a container.

2. The method of forming a container as set forth in claim 1 including:

a. holding said bottom member after said first and second fold lines are formed;

b. overlapping and securing together portions of a sidewall blank to form a tapered sidewall; and

c. moving said bottom member inside the sidewall toward a small end of the tapered sidewall whereby the skirt portion is in engagement with the interior surface of said sidewall for subsequent securing of same together.

3. The method as set forth in claim 2 wherein:

a. securing said bottom member to said sidewall be adhesion and reverse bending a portion of said sidewall to overlie a portion of said skirt.

4. The method as set forth in claim 2 wherein:

a. said first and second fold lines being generally circular and substantially concentric to one another.

5. A method of forming a container, said method including the steps of:

a. feeding a blank to a forming means;

b. forming a first fold line on said blank wherein a portion of said blank forms a depending skirt from said first fold line;

c. forming a second fold line on said blank after forming said first fold line with said second fold line being spaced inwardly from said first fold line whereby said blank is formed into a bottom member having a bottom panel portion and the depending skirt portion with said first and second fold lines therebetween;

d. inserting said bottom member into a pocket of a mandrel with said pocket having a diameter less than the formed diameter of the first fold line;

e. wrapping a container side wall blank about said mandrel and overlapping side marginal portions thereof and securing same together, said container blank having a portion thereof extending beyond a free end of the mandrel;

f. moving said bottom member out of said pocket whereby said skirt portion expands and engages an interior surface of said container sidewall blank; and

g. securing said skirt portion to said container blank.

6. The method of forming a container as set forth in claim 5 wherein:

a. said pocket having a size smaller than the circumference of the first fold line wherein upon movement of the bottom member out of the pocket said first fold line and thereby said skirt portion expands in size for engagement with said container sidewall blank.