US3260636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a longitudinally slotted and corrugated tube
Assignee: Metallschlauch Fabrik Pforzheim Vorm HCH Witzenmann GmbH
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Filing: 1965-03-08
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Granted: 1966-07-12
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Witzenmann Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:18
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/50; B29C65/5057; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0826; B21C37/10; B21C37/101; B21C37/104; B29C53/00; B29C53/36; B29C53/38; B29C53/48; B29C65/52; B29C65/526; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29D; B29D23/00; B29D23/18; B31; B31C; B31C3/00; B31F; B31F1/00; B31F1/20; B31F1/205; B31F7/00; B31F7/004; B29C65/4805; B29C65/481; B29C65/4815; B29C65/483; B29C65/4835; B29C65/484; B29C65/485; B29C65/5092; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013; Y10T156/1016; Y10T156/1018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A METHOD OF PRODUCING CORRUGATED TUBES, COMPRISING THE STEPS OF; SHAPING A FLAT STRIP OF MATERIAL TO FORM A TUBE WITH A LONGITUDINAL SLOT AND COATING AT LEAST ONE OF THE TWO OVERLAPPING PARALLEL EDGES OF THE TUBE WITH AN ADHESIVE WHICH IS SUITABLE FOR THE PARTICULAR MATERIAL OF THE TUBE, SAID ADHESIVE BEING ONE WICH HARDENS IN TWO STAGES, THE FIRST STAGE BETWEEN ONE WHEREIN THE ADHESIVE IS ONLY PARTIALLY HARDENED AND IS STILL YEILDABLE TO SHEARING STRESSES TO WHICH THE ADHESIVE, WHILE IN ITS FIRST STAGE, WILL BE SUBJECTED DURING A SUBSEQUENT OPERATION IN WHICH THE TUBE IS CORRUGATED, AND THE SECOND STAGE BEING ONE IN WHICH THE ADHESIVE IS FULLY HARDENED AND NO LONGER ABLE TO YIELD TO SUCH SHEARING STRESSES; PRESSING THE OVERLAPPING EDGES OF THE SLOTTED TUBE TOGETHER TO FORM A SEAM; AND CORRUGATING THE TU BE WHILE SAID ASHESIVE IS STILL IN SAID FIRST STAGE THEREOF, WHEREBY SAID ADHESIVE WILL NOT ATTAIN ITS SECOND STAGE UNTIL THE NEED FOR ALLOWING FIR A SHEARING STRESS HAS PASSED SAID FLAT STRIP OF MATERIAL BEING FLEXIBLE, STRONG AND TRICK ENOUGH TO WITHSTAND THE SHAPING AND CORRUGATING OPERATIONS.
Claim 2
Independent Claim
190 words
A METHOD OF PRODUCING CORRUGATED TUBES, COMPRISING THE STEPS OF; SHAPING A FLAT STRIP OF MATERIAL TO FORM A TUBE WITH A LONGITUDINAL SLOT AND COATING AT LEAST ONE OF THE TWO OVERLAPPING PARALLEL EDGES OF THE TUBE WITH AN ADHESIVE WHICH IS SUITABLE FOR THE PARTICULAR MATERIAL OF THE TUBE, SAID ADHESIVE BEING ONE WICH HARDENS IN TWO STAGES, THE FIRST STAGE BETWEEN ONE WHEREIN THE ADHESIVE IS ONLY PARTIALLY HARDENED AND IS STILL YEILDABLE TO SHEARING STRESSES TO WHICH THE ADHESIVE, WHILE IN ITS FIRST STAGE, WILL BE SUBJECTED DURING A SUBSEQUENT OPERATION IN WHICH THE TUBE IS CORRUGATED, AND THE SECOND STAGE BEING ONE IN WHICH THE ADHESIVE IS FULLY HARDENED AND NO LONGER ABLE TO YIELD TO SUCH SHEARING STRESSES; PRESSING THE OVERLAPPING EDGES OF THE SLOTTED TUBE TOGETHER TO FORM A SEAM; AND CORRUGATING THE TU BE WHILE SAID ASHESIVE IS STILL IN SAID FIRST STAGE THEREOF, WHEREBY SAID ADHESIVE WILL NOT ATTAIN ITS SECOND STAGE UNTIL THE NEED FOR ALLOWING FIR A SHEARING STRESS HAS PASSED SAID FLAT STRIP OF MATERIAL BEING FLEXIBLE, STRONG AND TRICK ENOUGH TO WITHSTAND THE SHAPING AND CORRUGATING OPERATIONS.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |