Patent US3964412A successfully refreshed from Google Patents.
US3964412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaping apparatus and a method for producing a seamless container
Assignee: Individual
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Filing: 1974-04-09
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Granted: 1976-06-22
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Expires: 1994-04-09
Abstract
Abstract This invention relates to a shaping device in a circulation system for producing a high pressure gas container by successively shaping a workpiece at a series of workstations. The device comprises a turn table, a plurality of holding frames, a series of drawing dies and an annealing means. The turn table is provided with a plurality of holding frames which are circumferentially arranged on said turn table at equally spaced distances and is adapted to turn in one direction and to stop alternately at each position of the holding frames. Each of the drawing dies comprises punch and a die combination whose dimensions gradually vary so that a bottomed steel cylinder can be successively drawn at each workstation and form a gas container having a narrow, thick opening. The drawing dies are installed in series right above the stop positions of the holding frames except the stop positions for mounting or charging, heating and demounting or discharging the steel cylinder. The heating means is positioned at the second stop position, after the first stop position at which mounting of the steel cylinder occurs or at any subsequent stop position where the workpiece may still be drawn. A ringed high frequency induction heater attached to the heating means is fitted right above the holding frame at the stop position for heating the workpiece. The bottomed steel cylinder material is mounted in and clamped to the holding frame and is gradually drawn into the shape of a gas container by the drawing dies in series.
Inventors
- 👤 Kaname Kitsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:51
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/24
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
231 words
In an apparatus for converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, a combination comprising a carrier having a plurality of spaced work stations; means for successively indexing said carrier to respective ones of said work stations; a plurality of workpiece-holding frames on said carrier and each having a cylindrical portion adapted to receive and firmly support the entire portion of a blank which will correspond to the trunk portion of the finished container; shaping means at some of said work stations adapted to move axially of the respective workpiece-holding frames for successively shaping an upper portion of the blank to form the shoulder and neck portions of the container; and clamping means at said working stations at which said shaping means are located for securely holding said workpieces during their shaping, including first cooperating means on said cylindrical portions and second cooperating means movable axially towards said cylindrical portions with said shaping means and into engagement with said first cooperating means so as to generate a radial clamping force on said cylindrical portions, whereby the firmly supported trunk portion of a blank is prevented from wrinkling under the effect of the axial movement of said shaping means during the conversion of the blank into a finished container.
Claim 2
Dependent Claim
231 words
In an apparatus for converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, a combination comprising a carrier having a plurality of spaced work stations; means for successively indexing said carrier to respective ones of said work stations; a plurality of workpiece-holding frames on said carrier and each having a cylindrical portion adapted to receive and firmly support the entire portion of a blank which will correspond to the trunk portion of the finished container; shaping means at some of said work stations adapted to move axially of the respective workpiece-holding frames for successively shaping an upper portion of the blank to form the shoulder and neck portions of the container; and clamping means at said working stations at which said shaping means are located for securely holding said workpieces during their shaping, including first cooperating means on said cylindrical portions and second cooperating means movable axially towards said cylindrical portions with said shaping means and into engagement with said first cooperating means so as to generate a radial clamping force on said cylindrical portions, whereby the firmly supported trunk portion of a blank is prevented from wrinkling under the effect of the axial movement of said shaping means during the conversion of the blank into a finished container.
Claim 3
Dependent Claim
16 words
A high pressure gas container produced by a successive drawing device as defined in claim 1.
Claim 4
Dependent Claim
26 words
A combination as defined in claim 1, wherein said carrier is a turntable and said work stations are equally spaced along the circumference of said turntable.
Claim 5
Dependent Claim
39 words
A combination as defined in claim 1, wherein said indexing means moves said frames to respective ones of said work stations and stops for a time period sufficient for each of said work stations to complete their respective functions.
Claim 6
Dependent Claim
41 words
A combination as defined in claim 1, wherein one of said work stations serves as a mounting station to receive fresh blank workpieces, and wherein a second one of said work stations serves as a demounting station to discharge finished containers.
Claim 7
Dependent Claim
28 words
A combination as defined in claim 1, wherein said frames are made of resilient material and have longitudinal slits so as to facilitate the holding of the workpieces.
Claim 8
Dependent Claim
104 words
A combination as defined in claim 1, wherein each of said shaping means comprises a punch having a contoured outer circumferential surface and a die having a contoured inner surface, the dimensions of said surfaces progressively varying at each successive work station so as to shape the upper portion of the blank to form the shoulder and neck portions of the container, said neck portion having a wall thickness which is larger than the wall thickness of the portion of the blank which corresponds to the trunk portion of a finished container so that said neck portion has sufficient wall thickness to be threaded.
Claim 9
Dependent Claim
32 words
A combination as defined in claim 1, wherein said cylindrical portion has an open end and a closed end, said first cooperating means comprising an annular tapered lip at said open end.
Claim 10
Dependent Claim
36 words
A combination as defined in claim 8, wherein said second corporating means comprises a fastening ring movable axially of the respective workpiece-holding frames and cooperatively engaging said tapered lip so as to securely hold the workpiece.
Claim 11
Dependent Claim
33 words
A combination as defined in claim 1 and further comprising heating means associated with at least one other of said work stations for thermally treating the upper portion of the respectively registered blank.
Claim 12
Dependent Claim
39 words
A combination as defined in claim 10, wherein said heating means is an annular high-frequency electric induction heater for thermally treating the upper portion of the respectively registered blank so as to facilitate the shaping by said shaping means.
Claim 13
Independent Claim
187 words
A method of converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, comprising the steps of firmly supporting the entire portion of a workpiece blank which will correspond to the trunk portion of the finished container by mounting the workpiece blank in a workpiece-holding frame provided on a carrier; successively indexing said carrier to a plurality of spaced work stations; successively shaping an upper portion of the respectively indexed workpiece blank to form the shoulder and neck portions of the container by effecting axial engagement of the upper portion of the blank with shaping means provided at some of said work stations; and axially moving a first clamping member into engagement with a second clamping member provided on said workpiece-holding frames during the step of shaping for securely holding each of the workpieces in respective ones of said workpiece-holding frames, whereby the firmly supported trunk portions of said workpiece blanks are prevented from wrinkling during the conversion of the respective workpiece blanks into finished containers.
Claim 14
Independent Claim
187 words
A method of converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, comprising the steps of firmly supporting the entire portion of a workpiece blank which will correspond to the trunk portion of the finished container by mounting the workpiece blank in a workpiece-holding frame provided on a carrier; successively indexing said carrier to a plurality of spaced work stations; successively shaping an upper portion of the respectively indexed workpiece blank to form the shoulder and neck portions of the container by effecting axial engagement of the upper portion of the blank with shaping means provided at some of said work stations; and axially moving a first clamping member into engagement with a second clamping member provided on said workpiece-holding frames during the step of shaping for securely holding each of the workpieces in respective ones of said workpiece-holding frames, whereby the firmly supported trunk portions of said workpiece blanks are prevented from wrinkling during the conversion of the respective workpiece blanks into finished containers.
Claim 15
Dependent Claim
32 words
A method as defined in claim 12; and further comprising the step of heating the upper portion of the respectively indexed workpiece blank at at least one other of said work stations.
Claim 16
Dependent Claim
238 words
In an apparatus for converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, a combination comprising a carrier having a plurality of spaced work stations; means for successively indexing said carrier to respective ones of said work stations; a plurality of workpiece-holding frames on said carrier and each having a cylindrical portion adapted to receive and firmly support the entire portion of a blank which will correspond to the trunk portion of the finished container, said cylindrical portion having an open end and a closed end, said open end having an annular tapered lip; shaping means at some of said work stations adapted to move axially of the respective workpiece-holding frames for successively shaping an upper portion of the blank to form the shoulder and neck portions of the container, said shaping means further comprising a fastening ring movable axially of the respective workpiece-holding frames and cooperatively engaging said tapered lip so as to securely hold the workpiece; and heating means associated with at least one other of said work stations for thermally treating the upper portion of the respectively registered blank, whereby the firmly supported trunk portion of a blank is prevented from wrinkling under the effect of the axial movement of said shaping means during the conversion of the blank into a finished container.
Claim 17
Dependent Claim
238 words
In an apparatus for converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, a combination comprising a carrier having a plurality of spaced work stations; means for successively indexing said carrier to respective ones of said work stations; a plurality of workpiece-holding frames on said carrier and each having a cylindrical portion adapted to receive and firmly support the entire portion of a blank which will correspond to the trunk portion of the finished container, said cylindrical portion having an open end and a closed end, said open end having an annular tapered lip; shaping means at some of said work stations adapted to move axially of the respective workpiece-holding frames for successively shaping an upper portion of the blank to form the shoulder and neck portions of the container, said shaping means further comprising a fastening ring movable axially of the respective workpiece-holding frames and cooperatively engaging said tapered lip so as to securely hold the workpiece; and heating means associated with at least one other of said work stations for thermally treating the upper portion of the respectively registered blank, whereby the firmly supported trunk portion of a blank is prevented from wrinkling under the effect of the axial movement of said shaping means during the conversion of the blank into a finished container.
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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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |