US3850776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for joining a tubular thermoplastic container jacket, by means of ultrasonics to a thermoplastic end cap to form a liquid-tight seal
Assignee: Individual
•
Filing: 1972-12-11
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Granted: 1974-11-26
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Expires: 1992-12-11
Abstract
Abstract In a process and apparatus for joining a tubular thermoplastic container jacket, by means of ultrasonics, to a thermoplastic end cap to form a liquid-tight seal, the end cap is inserted into the jacket so that the jacket rim projects beyond the cap, and an axially-oscillating sonotrode is advanced axially against the jacket rim to soften the jacket rim and roll it inwardly over the rim of the cap. The softened jacket rim is trapped in an annular chamber formed between the sonotrobe and the cap, and further advancement of the sonotrode applies welding pressure to the softened jacket rim.
Inventors
- 👤 L Rippel
- 👤 H Schmidinger
- 👤 W Pulitzer
- 👤 E Karobath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:36
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C65/00; B29C65/02; B29C65/08; B29C65/56; B29C65/567; B29C65/568; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/54; B29C66/542; B29C66/543; B29C66/61; B29C66/612; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/81431; B29C66/731; B29C66/7311; B29C66/73115; B29C66/73116
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
153 words
An apparatus for joining a projecting end portion of a cylindrically shaped thermoplastic jacket to a circularly shaped thermoplastic cap located within said jacket, apparatus comprising a sonotrode having a working end for generating ultrasonic oscillations, said working end having an annular recess defined therein and a part extending away from the outer wall of said recess in a direction perpendicular to the aixs defined by said recess, said outer wall having a diameter approximately the same as the diameter of said jacket, the bottom of said recess being the portion whereat said ultrasonic oscillations are converted to heat when said apparatus is in use and whereby when said apparatus is used, said extended part of said working end engages said projecting end portion of said jacket to crimp said projecting end portion radially inward and to weld said jacket to said cap without contacting the bottom of said recess with said cap.
Claim 2
Independent Claim
153 words
An apparatus for joining a projecting end portion of a cylindrically shaped thermoplastic jacket to a circularly shaped thermoplastic cap located within said jacket, apparatus comprising a sonotrode having a working end for generating ultrasonic oscillations, said working end having an annular recess defined therein and a part extending away from the outer wall of said recess in a direction perpendicular to the aixs defined by said recess, said outer wall having a diameter approximately the same as the diameter of said jacket, the bottom of said recess being the portion whereat said ultrasonic oscillations are converted to heat when said apparatus is in use and whereby when said apparatus is used, said extended part of said working end engages said projecting end portion of said jacket to crimp said projecting end portion radially inward and to weld said jacket to said cap without contacting the bottom of said recess with said cap.
Claim 3
Dependent Claim
23 words
The apparatus as claimed in claim 1, wherein the inner wall of said recess is defined by a projection of said working end.
Claim 4
Dependent Claim
62 words
The apparatus as claimed in claim 2, wherein said working end projection forms a blunt-ended narrow annular surface approximately perpendicular to the axis defined by said recess, the inner wall of said recess forming the outer surface of a cylindrical part of said working end with the inner surface of said cylindrical part being defined by a cavity in said working end.
Claim 5
Dependent Claim
62 words
The apparatus as claimed in claim 1, wherein said working end has defined therein a cavity centrally located with respect to said recess and said working end further comprises a hold-down means in the form of a sliding plunger adapted to slide inwardly in said cavity against the urging of a resilient means while outward sliding is propelled by said resilient means.
Claim 6
Dependent Claim
26 words
The apparatus as claimed in claim 4, wherein said hold-down means plunger is attached to said working end at a location approximately at an oscillation node.
Claim 7
Dependent Claim
34 words
The apparatus as claimed in claim 4, wherein said hold-down means plunger has defined at one end a cylindrical surface concentric with the inner surface of said cavity and terminating in an annular edge.
Claim 8
Dependent Claim
25 words
The apparatus as claimed in claim 6, wherein said hold-down means further comprises surfaces adapted to facilitate sliding over the inner surface of said cavity.
Claim 9
Dependent Claim
18 words
The apparatus as claimed in claim 5, wherein said hold-down means plunger is provided with a clearance recess.
Claim 10
Dependent Claim
32 words
The apparatus as claimed in claim 6, wherein the annular edge of said plunger is limited by an internal conical surface defining the rim of a recess in said hold-down means plunger.
Claim 11
Dependent Claim
20 words
The apparatus as claimed in claim 1, wherein the outside surface of said recess is extended to form a skirt.
Claim 12
Dependent Claim
16 words
The apparatus as claimed in claim 10, wherein the inner edge of said skirt is hollow-shaped.
References Cited (Backward Citations)
US2678471A
Cited
US2684397A
Cited
US2922832A
Cited
US3042288A
Cited
US3433681A
Cited
US3428238A
Cited
US3499808A
Cited
US3473967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |