US3759434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threading mechanism
Assignee: SVENSKA FALTFAB AB
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Filing: 1972-09-27
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Granted: 1973-09-18
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Expires: 1992-09-27
Abstract
Abstract Threading mechanism for a treatment plant which includes a band of flexible material folded upon itself to grip the leading end of the web material, the fold being closed on the web material adjacent the entrance end of the plant and separated from the web material at the discharge end of the plant. The mechanism includes a guiding surface or roller positioned adjacent the discharge end having a profile to open the folded band more than 180*, along with a drive roller for pulling the band around the profiled surface. The mechanism also includes jet elements for positively engaging the web material being treated into the fold of the band prior to its re-entry into the chamber. In one embodiment of the invention the profiled surface and the guide roller are mounted a substantial distance below the exit and entrance rollers for the folded band.
Inventors
- 👤 B Lindstrum
- 👤 B Citron
- 👤 S Rosby
- 👤 E Nelenius
- 👤 I Karlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
B; B65; B65H; B65H45/00; B65H45/02; B65H45/06; B65H45/08; B65H47/00; D; D21; D21G; D21G9/00; D21G9/0063
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
Device for feeding web material through a processing installation by means of a folded conveyor belt (1), which runs along at the side of the haulage way and which consists of two essentially flat segments (1a and 1b) joined at their outermost edges (2) and has means to separate the segments at the points where the strips are fed in and discharged, as well as means to bring the segments together again following feeding and discharge, wherein the means for opening the belt (1), consists of a guiding surface (5), having such a profile (camber) and located at such a considerable distance from the preceding roller (3), over which the belt proceeds folded, that the belt opens more than 180* from its folded condition, and a direct following driven roller (7) with significantly less camber.
Claim 2
Dependent Claim
135 words
Device for feeding web material through a processing installation by means of a folded conveyor belt (1), which runs along at the side of the haulage way and which consists of two essentially flat segments (1a and 1b) joined at their outermost edges (2) and has means to separate the segments at the points where the strips are fed in and discharged, as well as means to bring the segments together again following feeding and discharge, wherein the means for opening the belt (1), consists of a guiding surface (5), having such a profile (camber) and located at such a considerable distance from the preceding roller (3), over which the belt proceeds folded, that the belt opens more than 180* from its folded condition, and a direct following driven roller (7) with significantly less camber.
Claim 3
Dependent Claim
59 words
Device, according to claim 1 wherein the surface is comprised of a guide roller (5) for opening the folded belt (1), the guide roller (5) and the following roller (7) being joined by means of a transmission (8) constructed and positioned so that the peripheral speed of the guide roller is less than that of the following roller (7).
Claim 4
Dependent Claim
46 words
Device, according to claim 2, in which both segments (1a and 1b) of the conveyor belt are connected along the edge by means of a strong seam or bulb (2), wherein the guide roller (5) is designed with a guide track (6) for the bulb (2).
Claim 5
Dependent Claim
51 words
Device, according to claim 1 wherein at considerable distance from guide surface and the following roller, another roller (9) is arranged over which the belt (1) is to pass folded and including between the latter two rollers a unit (11) adapted to facilitate feeding of the strips of web material (12).
Claim 6
Dependent Claim
49 words
Device, according to claim 4, wherein the unit to facilitate the feeding of strips consists of a rotary roller (11), which is journaled in bearings and the periphery of which is in contact with the inner surface of the belt segment (1a), which passes practically untwisted through the device.
Claim 7
Dependent Claim
51 words
Device, according to claim 4 wherein the belt moves practically vertical at the point where the strips are fed in aNd including elements (14 and 15) placed after the feeding unit in order to ensure that the web material (12) which is fed in follows the belt until it comes together.
Claim 8
Dependent Claim
45 words
Device, according to claim 6 wherein said elements comprise pneumatic jets (14 and 15), which are adapted to blow the strips of material (12) against the lower belt segment and/or to blow the strips in the direction of the place where the belt comes together.
Claim 9
Dependent Claim
39 words
Device, according to claim 2 including a frame unit (13) mounting the guide roller (5), the following roller (7), and the transmission (8) separate from the processing installation and secured to the floor or to a low-level machine foundation.
Claim 10
Dependent Claim
63 words
Device, according to claim 8, wherein the exit and entrance rollers for the folded belt in the processing installation are placed in proximity of one another but at considerable distance from and directly above, the frame unit (13), whereby the belt is opened as it runs downwardly to said frame unit and is closed as it runs upwardly away from said frame unit.
References Cited (Backward Citations)
US2212024A
Cited
US3023300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |