Patent US3673928A successfully refreshed from Google Patents.
US3673928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for forming and sealing bliss style containers
Assignee: Weyerhaeuser Co
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Filing: 1969-08-27
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Granted: 1972-07-04
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Expires: 1989-08-27
Abstract
Abstract A machine for forming and gluing a three-part container having two wall panels and a body panel forming the bottom and the other two walls of the container. The body panel is sealed to the wall panels by flanges which are attached to the bottom and walls of the body panel, and which bend over and are contiguous with the faces of the wall panels. The apparatus carries the body panel into position between a mandrel and a die, and positions the wall panels with respect to the body panel. The mandrel then carries the body panel and wall panels through the die cavity to blend the flanges toward the wall panel, and into a compression section. The compression unit has two active positions: the first holds the bent flanges at an included angle of less than 45* and the second compresses the flanges against the wall panels to bond the flanges to the wall panels. When the compression unit retracts, the container is removed from the machine.
Inventors
- 👤 Charles D Striplin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:36
CPC Classifications
B; B31; B31B; B31B50/00; B31B50/26; B31B50/28; B31B50/30; B31B2105/00; B31B2105/002; B31B2105/0027; B31B50/44; B31B50/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
In an apparatus for forming container blanks into containers in which a blank is conveyed to a work station along a path and is positioned at said work station, said apparatus including first means for conveying said blank, a device adjacent to the exit end of said conveyor and aligned with the conveyor for maintaining the positional relationship of the blank to the apparatus at said work station comprising second means for positioning the leading edge of said blank positively at said work station, an inertial roll mounted on said apparatus between said conveyor and said work station and tangential to the path of said blank, the point of tangency of said inertia roll being spaced from said second means a distance equal to the length of said blank, detent means substantially aligned with the point of tangency of said inertia roll and on the side of said path opposite said inertia roll, means for moving said detent means toward said inertia roll, means for forming said blank at said work station, and means for actuating said forming means, said actuating means being actuated by a leading edge of said blank.
Claim 2
Dependent Claim
191 words
In an apparatus for forming container blanks into containers in which a blank is conveyed to a work station along a path and is positioned at said work station, said apparatus including first means for conveying said blank, a device adjacent to the exit end of said conveyor and aligned with the conveyor for maintaining the positional relationship of the blank to the apparatus at said work station comprising second means for positioning the leading edge of said blank positively at said work station, an inertial roll mounted on said apparatus between said conveyor and said work station and tangential to the path of said blank, the point of tangency of said inertia roll being spaced from said second means a distance equal to the length of said blank, detent means substantially aligned with the point of tangency of said inertia roll and on the side of said path opposite said inertia roll, means for moving said detent means toward said inertia roll, means for forming said blank at said work station, and means for actuating said forming means, said actuating means being actuated by a leading edge of said blank.
Claim 3
Dependent Claim
106 words
In a container-forming device in which a mandrel and die move relative to each other to fold a container around said mandrel, said mandrel having pairs of opposing sides and said die having pairs of opposing sides parallel to said mandrel sides, the improvement for folding certain of said container panels and not folding others comprising one set of opposing sides of said dies is split into a main section and an additional section and the additional section is spaced outwardly of the outer edge of said mandrel and the outer edge of the main section is spaced inwardly of the outer edge of said mandrel.
Claim 4
Dependent Claim
106 words
In a container-forming device in which a mandrel and die move relative to each other to fold a container around said mandrel, said mandrel having pairs of opposing sides and said die having pairs of opposing sides parallel to said mandrel sides, the improvement for folding certain of said container panels and not folding others comprising one set of opposing sides of said dies is split into a main section and an additional section and the additional section is spaced outwardly of the outer edge of said mandrel and the outer edge of the main section is spaced inwardly of the outer edge of said mandrel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |