Patent US4727709A successfully refreshed from Google Patents.
US4727709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steering, joining and guiding mechanism for zippered film
Assignee: SC Johnson Home Storage Inc
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Filing: 1986-07-25
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Granted: 1988-03-01
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Expires: 2006-07-25
Abstract
Abstract A steering, joining and guiding mechanism is disclosed for joining together opposing rib and groove fastener elements on a traveling continuous bag film. The steering, joining and guiding mechanism includes a pair of opposing press rolls. The longitudinal axis of each of the press rolls is offset from the direction of travel of the bag film. The press rolls are offset from about 2° to about 30° from a line perpendicular to the direction of travel of the bag film, and are preferably offset at about 5° from the direction of travel of the bag film.
Inventors
- 👤 Larry M. Zieke
- 👤 R. Douglas Behr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
B; B65; B65B; B65B61/00; B65B61/18; B65B61/188; B65B9/00; B65B9/10; B65B9/13; B65B9/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
214 words
In a form, fill and seal packaging machine, including means for supplying a continuous plastic bag film having interlocked reclosable fastener elements on respective opposing plies of said film, means for feeding said film through a filling station, a filling station for filling said film with product, means preceding said filling station for separating said fastener elements and guiding said film through said filling station, means for pressing said fastener elements together in an interlocking relationship, means for laterally sealing said bag film to form a bag assembly having first and second side seams, and means for severing said bag assembly from said bag film, the improvement wherein said means for pressing said fastener elements together in an interlocking relationship includes a pair of opposing press rolls, the longitudinal axis of each of said rolls being offset from about 2° to 30° from a line perpendicular to the direction of travel of said bag film and said filling station includes a portion disposed interiorly of said opposing plies of said bag film at generally the same point in the direction of travel of the bag film as said opposing press rolls, said filling station and press rolls being cooperatively positioned to permit the press rolls to pull the bag film against the filling station.
Claim 2
Dependent Claim
214 words
In a form, fill and seal packaging machine, including means for supplying a continuous plastic bag film having interlocked reclosable fastener elements on respective opposing plies of said film, means for feeding said film through a filling station, a filling station for filling said film with product, means preceding said filling station for separating said fastener elements and guiding said film through said filling station, means for pressing said fastener elements together in an interlocking relationship, means for laterally sealing said bag film to form a bag assembly having first and second side seams, and means for severing said bag assembly from said bag film, the improvement wherein said means for pressing said fastener elements together in an interlocking relationship includes a pair of opposing press rolls, the longitudinal axis of each of said rolls being offset from about 2° to 30° from a line perpendicular to the direction of travel of said bag film and said filling station includes a portion disposed interiorly of said opposing plies of said bag film at generally the same point in the direction of travel of the bag film as said opposing press rolls, said filling station and press rolls being cooperatively positioned to permit the press rolls to pull the bag film against the filling station.
Claim 3
Dependent Claim
26 words
The improvement of claim 1 wherein said press rolls are offset about 5° from a line perpendicular to the direction of travel of said bag film.
Claim 4
Dependent Claim
28 words
The improvement of claim 1 wherein said press rolls comprise a pair of rubber press rolls having a durometer hardness of between about 20 and 70 shore A.
Claim 5
Dependent Claim
87 words
The improvement of claim 1 further comrising a bracket means for supporting said pair of press rolls, the bracket means including a first bracket member for supporting one of the pair of press rolls and a second bracket member for supporting the other of the pair of press rolls, at least one of the first and second bracket members being movable to permit at least one of said pair of press rolls to be moved between a fastener element engaging position and a fastener element releasing position.
Claim 6
Dependent Claim
22 words
The improvement of claim 4 further comprising a means for biasing said pair of press rolls into the fastener element engaging position.
Claim 7
Dependent Claim
82 words
A steering, joining and guiding mechanism for joining together opposing rib and groove fastener elements on a traveling continuous bag film comprising a pair of opposing press rolls, the longitudinal axis of each of said rolls being offset from about 2° to about 30° from a line perpendicular to the direction of travel of said bag film, and means for positioning said rolls to enable said rolls to pull said bag film against a filling station disposed interiorly of said bag film.
Claim 8
Dependent Claim
82 words
A steering, joining and guiding mechanism for joining together opposing rib and groove fastener elements on a traveling continuous bag film comprising a pair of opposing press rolls, the longitudinal axis of each of said rolls being offset from about 2° to about 30° from a line perpendicular to the direction of travel of said bag film, and means for positioning said rolls to enable said rolls to pull said bag film against a filling station disposed interiorly of said bag film.
Claim 9
Dependent Claim
23 words
The invention of claim 6 wherein said press rolls are offset at about 5° from the direction of travel of said bag film.
Claim 10
Dependent Claim
28 words
The invention of claim 6 wherein said press rolls comprise a pair of rubber press rolls having a durometer hardness of between about 20 and 70, Shore A.
Claim 11
Dependent Claim
87 words
The invention of claim 6 further comprising a bracket means for supporting said pair of press rolls, the bracket means including a first bracket member for supporting one of the pair of press rolls and a second bracket member for supporting the other of the pair of press rolls, at least one of the first and second bracket members being movable to permit at least one of said pair of press rolls to be moved between a fastener element engaging position and a fastener element releasing position.
Claim 12
Dependent Claim
21 words
The invention of claim 9 further comprising means for biasing said pair of press rolls into the fastener element engaging position.
References Cited (Backward Citations)
US1995462A
Cited
US2146308A
Cited
US3807118A
Cited
US3815317A
Cited
US4007865A
Cited
US4201132A
Cited
US4355494A
Cited
US4582549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |