US3909340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing a sheet material comprising a continuous web of a thermoplastics material with locally secured fastener elements
Assignee: Individual
•
Filing: 1973-04-12
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Granted: 1975-09-30
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Expires: 1993-04-12
Abstract
Abstract A method and an apparatus for securing fastener elements to a continuous sheet of plastics material in direct conjunction with the extrusion of the sheet and before it has solidified. Fastener elements are stacked in a magazine shaft below which there is mounted a stationary discharge passage extending towards the extruder and curved towards a moving roller or like element mounted below the extruder for receiving and advancing the extruded sheet. A flexible slide having tongues engaging with the fastener elements is reciprocated in a predetermined timing pattern within the discharge passage to take fasteners in sequence from the bottom of the magazine and deliver them unto the roller, which brings them into contact with the plastic film. Stationary tongues are provided in the discharge passage for preventing fastener elements from moving backwards when the slide is retracted.
Inventors
- 👤 Erik Solbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:07
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/47; B29C66/472; B29C65/00; B29C65/02; B29C66/41; B29C66/43; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B65; B65G; B65G59/00; B65G59/06; B65G59/061; B65G59/066; B65G59/067; B29C66/71; B29C66/72; B29C66/721; B29C66/7212; B29C66/731; B29C66/7311; B29C66/73115; B29C66/73116; B29L; B29L2007/00; B29L2007/005; B29L2031/00; B29L2031/709; B29L2031/7096; B29L2031/71; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1734; Y10T156/1737; Y10T156/1744; Y10T156/1768; Y10T156/1785
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
194 words
APPARATUS FOR MANUFACTURING A SHEET MATERIAL FOR USE AS TARPAULINS TENT-CLOTH AND THE LIKE AND COMPRISING A CONTINUOUS WEB OF A THERMOPLASTIC MATERIAL WITH LOCALLY SECURED FASTENER ELEMENTS, SAID APPARATUS COMPRISING AN EXTURDER HEAD HAVING AN ELOGANATED GENERALLY DOWNWARDLY ORIENTED NOZZLE ORIFICE, A PAIR OF ROLLERS MOUNTED GENERALLY BELOW SAID NOZZLE ORIFICE AND LATERALLY SPACED SO AS TO FORM BETWEEN THEM A NIP FOR CALIBRATING A FILM EXTRUDED THROUGH SAID NOZZLE ORIFICE, AND MEANS FOR CONTINUOUSLY ROTATING SAID ROLLERS IN OPPOSITE DIRECTIONS, AND A FEEDING DEVICE MOUNTED ABOVE ONE OF SAID ROLLERS AND COMPRISING A MAGAZINE FOR CONTAINING A SUPPLY OF FASTENER ELEMENTS, SAID MAGAZINE BEING LATERALLY SPACED FROM SAID EXTRUDER HEAD, WALL MEANS DEFINING A DISCHARGE PASSAGE EXTENDING FROM SAID MAGAZINE TOWARDS SAID ROLLER NIP, AN EXIT OPENING IN SAID MAGAZINE CNNECTING THE MAGAZINE WITH THE PASSAGE, A SLIDE EXTENDING INTO SAID DISCHARGE PASSAGE AND HAVING AT LEAST ONE PUSHER MEMBER FOR WITHDRAWING ONE FASTENER ELEMENT AT A TIME FROM SAID MAGAZINE AND PUSHING IT INTO THE DISCHARGE PASSAGE, AND DRIVE MEANS FOR EFFECTING AN INTERMITTENT RECIPROCATING LENGTHWISE MOVEMENT OF SAID SLIDE IN TIMED RELATIONSHIP WITH THE PERIPHERAL SPEED OF SAID ONE ROLLER.
Claim 2
Dependent Claim
194 words
APPARATUS FOR MANUFACTURING A SHEET MATERIAL FOR USE AS TARPAULINS TENT-CLOTH AND THE LIKE AND COMPRISING A CONTINUOUS WEB OF A THERMOPLASTIC MATERIAL WITH LOCALLY SECURED FASTENER ELEMENTS, SAID APPARATUS COMPRISING AN EXTURDER HEAD HAVING AN ELOGANATED GENERALLY DOWNWARDLY ORIENTED NOZZLE ORIFICE, A PAIR OF ROLLERS MOUNTED GENERALLY BELOW SAID NOZZLE ORIFICE AND LATERALLY SPACED SO AS TO FORM BETWEEN THEM A NIP FOR CALIBRATING A FILM EXTRUDED THROUGH SAID NOZZLE ORIFICE, AND MEANS FOR CONTINUOUSLY ROTATING SAID ROLLERS IN OPPOSITE DIRECTIONS, AND A FEEDING DEVICE MOUNTED ABOVE ONE OF SAID ROLLERS AND COMPRISING A MAGAZINE FOR CONTAINING A SUPPLY OF FASTENER ELEMENTS, SAID MAGAZINE BEING LATERALLY SPACED FROM SAID EXTRUDER HEAD, WALL MEANS DEFINING A DISCHARGE PASSAGE EXTENDING FROM SAID MAGAZINE TOWARDS SAID ROLLER NIP, AN EXIT OPENING IN SAID MAGAZINE CNNECTING THE MAGAZINE WITH THE PASSAGE, A SLIDE EXTENDING INTO SAID DISCHARGE PASSAGE AND HAVING AT LEAST ONE PUSHER MEMBER FOR WITHDRAWING ONE FASTENER ELEMENT AT A TIME FROM SAID MAGAZINE AND PUSHING IT INTO THE DISCHARGE PASSAGE, AND DRIVE MEANS FOR EFFECTING AN INTERMITTENT RECIPROCATING LENGTHWISE MOVEMENT OF SAID SLIDE IN TIMED RELATIONSHIP WITH THE PERIPHERAL SPEED OF SAID ONE ROLLER.
Claim 3
Dependent Claim
26 words
Apparatus as claimed in claim 1 wherein said discharge passage is curved towards the associated roller, and said slide is made of a thin flexible material.
Claim 4
Dependent Claim
21 words
Apparatus as claimed in claim 1 in which said slide carries a plurality of pusher members spaced longitudinally of said slide.
Claim 5
Dependent Claim
21 words
Apparatus as claimed in claim 1 wherein the leading end of said discharge passage is laterally spaced from said extruder head.
Claim 6
Dependent Claim
59 words
Apparatus as claimed in claim 1 wherein said magazine comprises a substantially vertically oriented magazine shaft for receiving a stack of fastener elements, said exit opening being provided in the lower end of said shaft, whereby said reciprocating movement of said pusher member effects a transfer of the lowermost fastener element present in said shaft into said discharge passage,
Claim 7
Dependent Claim
78 words
Apparatus as claimed in claim 5 for securing fastener elements, which are flexible at least along their peripheral edge, further comprising at least two threaded spindles rotatably supported along the periphery of said magazine shaft with their axes parallel to the axis of said shaft and with the threads thereon extending into said shaft, and means for continuously rotating said spindles, whereby they exert a downwardly directed force upon the fastener elements of a stack within said shaft.
Claim 8
Dependent Claim
32 words
Apparatus as claimed in claim 5 wherein the height of said exit opening in said magazine shaft increases gradually from the lateral edges of said discharge passage towards the central part thereof.
Claim 9
Dependent Claim
69 words
Apparatus as claimed in claim 5 and for securing fastener elements having an aperture therethrough, wherein at least one pawl member is provided on the upper wall of said discharge passage remote from the associated roller, said pawl member being adapted to engage with the aperture of a fastener element so as to prevent a rearward movement of said element in said discharge passage when the slide is retracted.
Claim 10
Dependent Claim
40 words
Apparatus as claimed in claim 8, wherein a depression is formed in the leading edge of said pawl member, and the upper surface of said pusher member is formed with a complementary depression, in which the first-mentioned depression may engage.
Claim 11
Dependent Claim
49 words
Apparatus as claimed in claim 8, wherein said upper wall is formed with at least one aperture, which is larger than the aperture in a fastener element, and said pawl member is a separate member secured to said wall behind said aperture therein and extending forwardly into the aperture.
Claim 12
Dependent Claim
33 words
Apparatus as claimed in claim 8, further comprising an upright rod freely movable within said magazine shaft and having a cross-section smaller than the cross section of said aperture in a fastener element.
Claim 13
Dependent Claim
14 words
Apparatus as claimed in claim 11, wherein said rod has a convex lower end.
References Cited (Backward Citations)
US3219507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |