US3801246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for shrinking a wrapping around a transport unit by means of radiant energy
Assignee: Individual
•
Filing: 1972-08-28
•
Granted: 1974-04-02
•
Expires: 1992-08-28
Abstract
Abstract In an apparatus for shrinking wrappings of heat-shrinkable sheet plastic surrounding transport units by subjecting the wrapped units to directional radiant energy from emitters, the emitters are turnably and movably mounted and actuated to more or less accurately follow the contour of said unit at some distance therefrom so as to irradiate all portions of the unit wrapping more uniformly.
Inventors
- 👤 O Gustavsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:36
CPC Classifications
B; B65; B65B; B65B53/00; B65B53/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
An apparatus for shrinking a wrapping of heat-shrinkable sheet plastic that surrounds a transport unit, comprising at least one directional emitter unit operative to emit radiant energy towards the wrapped transport unit and means for effecting a relative movement between said wrapped unit and the emitter unit in a predetermined direction so as to cause said emitter unit to irradiate successive surface portions of the shrinkable wrapping during successive stages of said relative movement, said emitter unit being turnable about at least one pivot axis that is approximately at right angles to the direction of said relative movement, and means being provided to turn said emitter unit about said axis in response to the change in mutual position occurring between the transport unit and said emitter unit during said relative movement.
Claim 2
Independent Claim
131 words
An apparatus for shrinking a wrapping of heat-shrinkable sheet plastic that surrounds a transport unit, comprising at least one directional emitter unit operative to emit radiant energy towards the wrapped transport unit and means for effecting a relative movement between said wrapped unit and the emitter unit in a predetermined direction so as to cause said emitter unit to irradiate successive surface portions of the shrinkable wrapping during successive stages of said relative movement, said emitter unit being turnable about at least one pivot axis that is approximately at right angles to the direction of said relative movement, and means being provided to turn said emitter unit about said axis in response to the change in mutual position occurring between the transport unit and said emitter unit during said relative movement.
Claim 3
Dependent Claim
29 words
An apparatus as claimed in claim 1, wherein said emitter unit has an elongate shape, the longitudinal axis of which is at least approximately parallel with said pivot axis.
Claim 4
Dependent Claim
133 words
An apparatus as claimed in claim 1, wherein said emitter unit is turnable from a first position, in which its radiant energy for its main part is hitting that portion of the wrapping which is on the front side of the transport unit as calculated in the direction of relative movement, via a second position, in which its radiant energy is hitting the wrapping of the transport unit in a direction that is substantially normal to the direction of relative movement, and into a third position, in which its radiant energy for its main part is hitting that portion of the wrapping which is on the rear side of the transport unit as calculated in the direction of relative movement, said emitter unit being returnable from said third position to said first position.
Claim 5
Dependent Claim
29 words
An apparatus as claimed in claim 1, wherein said emitter unit is turnable against the action of spring means tending to return the same to a predetermined initial position.
Claim 6
Dependent Claim
43 words
An apparatus as claimed in claim 1, wherein said means for turning said emitter unit comprises an actuating arm connected thereto and projecting into the path of the transport unit in order to be actuated upon by the latter during said relative movement.
Claim 7
Dependent Claim
21 words
An apparatus as claimed in claim 1, wherein said emitter unit is turnable about two spaced but mutually parallel pivot axes.
Claim 8
Dependent Claim
21 words
An apparatus as claimed in claim 6, wherein said two pivot axes are spaced in the direction of said relative movement.
Claim 9
Dependent Claim
25 words
An apparatus as claimed in claim 6, wherein one of said two spaced pivot axes substantially coincides with a centre axis of the emitter unit.
Claim 10
Dependent Claim
48 words
An apparatus as claimed in claim 1, wherein said emitter unit is supported at the free outer margin of a gate-like frame structure that is swingable about a First pivot axis, and wherein said emitter unit is turnable relative to said frame structure about a second pivot axis.
Claim 11
Dependent Claim
57 words
An apparatus as claimed in claim 9, wherein said swingable frame structure comprises a wheel that is adapted to be actuated upon by the transport unit during said relative movement in order to thereby change the position of said emitter unit relative to the transport unit by causing said frame structure to swing about said first axis.
Claim 12
Dependent Claim
26 words
An apparatus as claimed in claim 1, wherein two turnable emitter units are provided to irradiate each one side of a transport unit passing between them.
Claim 13
Dependent Claim
34 words
An apparatus as claimed in claim 1, wherein said means for effecting said relative movement comprises a driven conveyor for moving the transport unit relative to said emitter unit along a substantially rectilinear path.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |