US3950977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawing of elongated stock
Assignee: KM Kabelmetal AG
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Filing: 1975-01-23
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Granted: 1976-04-20
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Expires: 1995-01-23
Abstract
Abstract A single capstan drum is used to pull alternatingly e.g. tubing through dies and coiling it on the periphery of the drum. The tubing to be drawn is taken from different stores, and while the tubing from one store is drawn, the other die and tubing of another store is prepared and inserted into that die, so that upon change-over the drum has to be halted merely briefly to fasten the end of the prepared tubing to the drum's periphery. The drawn tubing which was coiled dropped off the drum as soon as its end had left the respective die.
Inventors
- 👤 Otto Uhlmann
- 👤 Norbert Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:25
CPC Classifications
B; B21; B21C; B21C1/00; B21C1/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
Apparatus for drawing elongated tubular stock comprising: a single pulling drum with means for fastening one end of such tubular stock to be drawn; a plurality of drawing dies disposed around the periphery of said drum respectively for drawing tubular stock taken from one of a plurality of different stores, through only one of said dies at a time and as said tubular stock is being uncoiled from one of said stores and coiled onto the rotating drum, whereby tubular stock drawn by different ones of the dies is coiled onto the drum at different locations, the other die or dies are being prepared for drawing uncoiled tubular stock from a different store or the plurality of stores; and a plurality of sets of straightening rolls, the sets being respectively disposed in front of the dies, the set of rolls in front of the one die straightening the tubular stock prior to drawing by the one die, another one of the sets of the plurality holding the beginning of tubular stock from the different store in the respective die prior to being used next following exhaustion of the one store.
Claim 2
Dependent Claim
190 words
Apparatus for drawing elongated tubular stock comprising: a single pulling drum with means for fastening one end of such tubular stock to be drawn; a plurality of drawing dies disposed around the periphery of said drum respectively for drawing tubular stock taken from one of a plurality of different stores, through only one of said dies at a time and as said tubular stock is being uncoiled from one of said stores and coiled onto the rotating drum, whereby tubular stock drawn by different ones of the dies is coiled onto the drum at different locations, the other die or dies are being prepared for drawing uncoiled tubular stock from a different store or the plurality of stores; and a plurality of sets of straightening rolls, the sets being respectively disposed in front of the dies, the set of rolls in front of the one die straightening the tubular stock prior to drawing by the one die, another one of the sets of the plurality holding the beginning of tubular stock from the different store in the respective die prior to being used next following exhaustion of the one store.
Claim 3
Dependent Claim
17 words
Apparatus as in claim 1, wherein the drum has vertical disposition and a vertical axis of rotation.
Claim 4
Dependent Claim
25 words
Apparatus as in claim 1, wherein two drawing dies are disposed for obtaining drawing in parallel directions, the drum provided for rotating in opposite directions.
References Cited (Backward Citations)
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US1578351A
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US2049053A
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US3319451A
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US3462992A
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US3496751A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |