Patent US3851444A successfully refreshed from Google Patents.
US3851444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for opening and protecting from contamination heat-sealable bags
Assignee: Individual
•
Filing: 1973-05-04
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Granted: 1974-12-03
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Expires: 1993-05-04
Abstract
Abstract There is disclosed apparatus for opening and protecting heatsealable bags including spreading means adapted to enter the top of the bag to keep the same open the spreading means have coverings of resilient material which press against sealing zones of the internal surfaces of the bag and thereby prevent air-borne particles from reaching the sealing zones. Suction tubes extending through the resilient material are also provided for extracting air-borne material. The spreading means is slidably carried by a casing for horizontal movement while the casing is vertically slidable on guide rails.
Inventors
- 👤 J Merat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:43
CPC Classifications
B; B65; B65B; B65B55/00; B65B55/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
195 words
An apparatus for filling and sealing a bag having an upwardly turned mouth, comprising: a filling station provided with an outlet; a pair of horizontally extending support rails running from the region of said outlet; a carriage mounted on said support rails and horizontally displaceable thereon from said region to another region; a bag-sealing station at said other region for sealing the mouth of a bag; a pair of leaf springs having opposite extremities lying substantially against one another and mounted on said carriage; means on said carriage for relatively displacing the opposite extremities of said leaf springs toward and away from one another to alternately spread said leaf springs apart between their extremities to spread the mouth of a bag fitted over said leaf springs; resilient layers disposed along at least opposite lateral faces of said leaf springs for contacting internal surfaces of said bag along said mouth for preventing contamination thereof; means displaceable from one of said regions toward the other region for entraining said carriage therebetween along said rails; and horizontally movable abutments at least at the first mentioned region for laterally engaging external surfaces of a bag spread by said springs.
Claim 2
Independent Claim
195 words
An apparatus for filling and sealing a bag having an upwardly turned mouth, comprising: a filling station provided with an outlet; a pair of horizontally extending support rails running from the region of said outlet; a carriage mounted on said support rails and horizontally displaceable thereon from said region to another region; a bag-sealing station at said other region for sealing the mouth of a bag; a pair of leaf springs having opposite extremities lying substantially against one another and mounted on said carriage; means on said carriage for relatively displacing the opposite extremities of said leaf springs toward and away from one another to alternately spread said leaf springs apart between their extremities to spread the mouth of a bag fitted over said leaf springs; resilient layers disposed along at least opposite lateral faces of said leaf springs for contacting internal surfaces of said bag along said mouth for preventing contamination thereof; means displaceable from one of said regions toward the other region for entraining said carriage therebetween along said rails; and horizontally movable abutments at least at the first mentioned region for laterally engaging external surfaces of a bag spread by said springs.
Claim 3
Dependent Claim
33 words
The aPparatus defined in claim 1 further comprising at least one suction conduit embedded in said resilient layers for suction removal of particles along the surfaces of said bag juxtaposed with said layers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |