Patent US3786667A successfully refreshed from Google Patents.
US3786667A
Expired / Lapsed
US
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Apparatus for and method of making a nestable container
Assignee: Reynolds Metals Co
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Filing: 1971-10-26
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Granted: 1974-01-22
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Expires: 1991-10-26
Abstract
Abstract An improved apparatus for and method of making a nestable container are provided wherein a flat blank is drawn to define a drawn container which is reverse redrawn to form the nestable container which has a side wall and an annular planar flange extending therefrom with a toroidal bead extending from the flange and having at least a portion thereof arranged within and beneath the peripheral edge of the flange. The apparatus comprises a die set having integral fluid cushion means of simple construction which controls the movements of cooperating dies during both the drawing and reverse redrawing action.
Inventors
- 👤 E Garnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:31
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/24; B21D51/00; B21D51/16; B21D51/26; B21D51/2646
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
411 words
An apparatus for making a nestable container from a flat blank comprising; a first die set comprising, a first die member supported at a fixed position and having an inside and an outside forming surface, an annular ring supported concentrically around said first die member, and fluid cushion means provided as an integral part of said first die set; a second die set comprising a second die member and a punch; said die sets and members being supported for relative movement toward and away from each other; said second die member cooperating with said outside forming surface upon movement of said second die member in one direction to form a drawn container from said blank with the movement of said second member being controlled by said annular ring and said integral fluid cushion means; said punch cooperating with said inside forming surface upon moving said punch in said one direction to form a reverse redrawn container by redrawing said drawn container while keeping a tubular wall portion of the drawn container outwardly of said outside forming surface; said punch being controlled during said reverse redrawing by said annular ring and said integral fluid cushion means; said annular ring having an inside portion which is adapted to be urged against said tubular wall portion by said integral fluid cushion means to define a reverse bead on said container having a toroidal configuration; said first die set comprising a die holder having a cylindrical inside surface and a transverse bottom portion; said first die member being fixed to said die holder concentrically within said cylindrical inside surface with said annular ring being supported concentrically between said first die member and said cylindrical inside surface; said integral fluid cushion means comprising a cylindrical housing portion having a bottom plate, said cylindrical housing portion and plate being fixed against said transverse bottom portion and defining a fluid chamber, and a fluid piston assembly supported for axial sliding movement within said fluid chamber, said piston assembly operatively associating with said annular ring to control its axial movement; said transverse bottom portion having a pluralitY of openings extending therethrough parallel to the central axis for said first die set and further comprising a plurality of pressure pins corresponding in number to said openings and extending therethrough, each of said pins having one end engaging said annular ring and an opposite end engaging said piston assembly to thereby transmit movement of said annular ring to said piston assembly.
Claim 2
Independent Claim
411 words
An apparatus for making a nestable container from a flat blank comprising; a first die set comprising, a first die member supported at a fixed position and having an inside and an outside forming surface, an annular ring supported concentrically around said first die member, and fluid cushion means provided as an integral part of said first die set; a second die set comprising a second die member and a punch; said die sets and members being supported for relative movement toward and away from each other; said second die member cooperating with said outside forming surface upon movement of said second die member in one direction to form a drawn container from said blank with the movement of said second member being controlled by said annular ring and said integral fluid cushion means; said punch cooperating with said inside forming surface upon moving said punch in said one direction to form a reverse redrawn container by redrawing said drawn container while keeping a tubular wall portion of the drawn container outwardly of said outside forming surface; said punch being controlled during said reverse redrawing by said annular ring and said integral fluid cushion means; said annular ring having an inside portion which is adapted to be urged against said tubular wall portion by said integral fluid cushion means to define a reverse bead on said container having a toroidal configuration; said first die set comprising a die holder having a cylindrical inside surface and a transverse bottom portion; said first die member being fixed to said die holder concentrically within said cylindrical inside surface with said annular ring being supported concentrically between said first die member and said cylindrical inside surface; said integral fluid cushion means comprising a cylindrical housing portion having a bottom plate, said cylindrical housing portion and plate being fixed against said transverse bottom portion and defining a fluid chamber, and a fluid piston assembly supported for axial sliding movement within said fluid chamber, said piston assembly operatively associating with said annular ring to control its axial movement; said transverse bottom portion having a pluralitY of openings extending therethrough parallel to the central axis for said first die set and further comprising a plurality of pressure pins corresponding in number to said openings and extending therethrough, each of said pins having one end engaging said annular ring and an opposite end engaging said piston assembly to thereby transmit movement of said annular ring to said piston assembly.
Claim 3
Dependent Claim
33 words
An apparatus as set forth in claim 1 in which said fluid cushion means comprises air cushion means and further comprising an air pressure control system for controlling air pressure in said chamber.
Claim 4
Dependent Claim
48 words
An apparatus as set forth in claim 1 in which said first die member has a cylindrical lower extension which extends beneath said transverse bottom portion of said die holder and axially through said fluid chamber, said cylindrical extension serving as a central guide for said piston assembly.
Claim 5
Dependent Claim
25 words
An apparatus as set forth in claim 3 in which said first die set further comprises a knockout device for removing the completed container therefrom.
Claim 6
Dependent Claim
98 words
An apparatus as set forth in claim 3 in which said first die member also has a portion supported beneath and within its inside forming surface for forming the bottom wall of said container and said first die set further comprising a rod fixed to the bottom-wall forming portion, said rod extending through an axial bore in said first die member and through said bottom plate, and an actuator for actuating said rod upon completing said container, said rod and bottom-wall forming portion comprising a knockout device for removing each completed container from within said first die set.
Claim 7
Dependent Claim
40 words
An apparatus as set forth in claim 5 in which said rod has a piston fixed to its lower end and further comprising a pneumatic cylinder adapted to receive said piston therein, said piston and cylinder comprising said knockout device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |