US3902302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for vacuum packaging various products
Assignee: Individual
•
Filing: 1974-09-23
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Granted: 1975-09-02
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Expires: 1994-09-23
Abstract
Abstract A machine for vacuum packaging various products which comprises means for supporting two reels of strip for forming the product containers, means for forming in at least one of said strips cavities for housing the products in transverse and longitudinal parallel rows, welding means for longitudinally and transversely welding the strips around the edges of said cavities after depositing the products to be packaged in them. In addition it comprises a carriage driven with reciprocating motion parallel to the strip feed direction, a plurality of suction tubes supported by said carriage and positioned so as to penetrate between the strips at the point where they become superimposed, and connected to suction means for evacuating the formed cavities. Also provided are pincer means for gripping the lateral edges of the strips, which are disposed at the height of the welding means and are forced in the direction of mutual withdrawal to keep the strips taut during the welding stage.
Inventors
- 👤 Cesare Tartarini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:02
CPC Classifications
B; B65; B65B; B65B31/00; B65B31/04; B65B31/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
263 words
A machine for vacuum packaging various products, in particular food products, comprising means for supporting two reels of strip for forming the product containers, means for forming in at least one of said strips cavities for housing the products in transverse and longitudinal parallel rows, welding means for longitudinally and transversely welding the strips around the edges of said cavities after depositing the products to be packaged in them, comprising a carriage driven with reciprocating motion parallel to the strip feed direction, a plurAlitiy of suction tubes supported by said carriage and positioned so as to penetrate between the strips at the point where they become superimposed, and connected to suction means for evacuating the formed cavities, pincer means for gripping the lateral edges of the strips, which are disposed at the height of the welding means and are forced in the direction of mutual withdrawal to keep the strips taut during the welding stage, the welding means having a perimeter which comprises two longitudinal portions for welding the strips between the adjacent cavities of longitudinal rows, from the ends downstream of said longitudinal portions there extending transverse segments and the upstream ends of said longitudinal portions being connected by a transverse portion in which a seat is provided for the penetration of the tubes, one of said transverse segments being arranged to integrate at each carriage stroke the welding of the strips at said seat, the carriage stroke being such that the mouths of the tubes are brought from a position downstream of the transverse segments to a position upstream of them.
Claim 2
Dependent Claim
263 words
A machine for vacuum packaging various products, in particular food products, comprising means for supporting two reels of strip for forming the product containers, means for forming in at least one of said strips cavities for housing the products in transverse and longitudinal parallel rows, welding means for longitudinally and transversely welding the strips around the edges of said cavities after depositing the products to be packaged in them, comprising a carriage driven with reciprocating motion parallel to the strip feed direction, a plurAlitiy of suction tubes supported by said carriage and positioned so as to penetrate between the strips at the point where they become superimposed, and connected to suction means for evacuating the formed cavities, pincer means for gripping the lateral edges of the strips, which are disposed at the height of the welding means and are forced in the direction of mutual withdrawal to keep the strips taut during the welding stage, the welding means having a perimeter which comprises two longitudinal portions for welding the strips between the adjacent cavities of longitudinal rows, from the ends downstream of said longitudinal portions there extending transverse segments and the upstream ends of said longitudinal portions being connected by a transverse portion in which a seat is provided for the penetration of the tubes, one of said transverse segments being arranged to integrate at each carriage stroke the welding of the strips at said seat, the carriage stroke being such that the mouths of the tubes are brought from a position downstream of the transverse segments to a position upstream of them.
Claim 3
Dependent Claim
58 words
A machine as claimed in claim 1, in which said tubes comprise a portion of flat elliptical cross section which extends horizontally in the plane joining the packaging strips and is positioned along the strip feed direction, and a portion bent upwards at 90* and connected by a flexible tube to the suction means supported in said carriage.
Claim 4
Dependent Claim
59 words
A machine as claimed in claim 2, in which said bent portion is inserted in a bush rotatably supported in a block in the carriage, between said block and a ring rigid with the bush there being interposed a spring which operates in torsion and is arranged to keep the horizontal portion of the tube in a longitudinal position.
Claim 5
Dependent Claim
68 words
A machine as claimed in claim 3, in which said blocks are provided with a shank rotatably supported in a sleeve along the strip feed direction, a vertical rod being radially rigid with said shank and having its summit inserted in a fork element comprising a step against which the rod engages during the longitudinal movements of the carriage to cause rotation of the tubes parallel to themselves.
Claim 6
Dependent Claim
85 words
A machine as claimed in claim 1, in which said pincer members comprise a pair of tongues disposed respectively above and below the lateral edges of the strips and mutually approachable, with one of said tongues, there being rigid a blade which projects between the strips for locking them, said tongues being supported at the summit of respective levers supported lateral to the strips in such a manner as to oscillate in a plane normal to the strip feed direction, and driven in opposing directions.
Claim 7
Dependent Claim
49 words
A machine as claimed in claim 5, in which a longitudinal bar is rigid with the summit of said levers, the bar carrying a pair of idle rollers cooperating together and thrust by elastic means against each other, and between which the edge of the packaging strips is led.
References Cited (Backward Citations)
US3009298A
Cited
US3061984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |