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US3108921A Expired / Lapsed US ⏱️ 0.0 years remaining

Machine for the manufacture of rails used in ladders

Assignee: Putnam Rolling Ladder Co Inc
•
Filing: 1959-12-31
•
Granted: 1963-10-29
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Expires: 1979-12-31
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Abstract

No abstract record available.

Inventors

  • 👤 Edward T Gillman
  • 👤 Gene E Basile

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 20:58
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/525; B29C53/00; B29C53/56; B29C53/58; B29C53/581; B29C53/60; B29C53/68; B29C63/00; B29C63/02; B29C63/04; B29C63/08; B29C63/10; B29C63/105; B29C70/68; B29C70/86; B29C70/865; B29D; B29D99/00; B29D99/0046; E; E06; E06C; E06C7/00; E06C7/08; B29L; B29L2031/00; B29L2031/06

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 171 words
A MACHINE FOR COLLECTIVELY AND SIMULTANEOUSLY WRAPPING A PLURALITY OF FIBER GLASS STRIPS DISPOSED IN LENGTHWISE SUPERPOSED RELATION TO EACH OTHER AROUND A CORE OF BALSA WOOD HAVING AN ELLIPSE CROSS-SECTION FORMING A RAIL FOR USE IN A LADDER, SAID MACHINE COMPRISING, A MOUNTING FRAME, A MOTOR MUONTED ON SAID FRAME, A GEAR MECHANISM ACTUATED BY SAID MOTOR, A PLURALITY OF ROLLER MEMBERS ACTUATED BY SAID GEAR MECHANISM FOR IMPARTING A LONGITUDINAL MOVEMENT TO THE CORE AND TO THE STRIPS ATTACHED TO ONE END OF THE CORE, SPRING MEANS FOR PRESSING SAID ROLLER MEMBERS AGAINST THE CORE, A TWO-PART FORMING DIE MOUNTED ON SAID FRAME IN POSITION FOR ENGAGEMENT BY THE CORE AND THE STRIPS UPON THE OPERATION OF SAID ROLLER MEMBERS, SAID DIE CONSISTING OF A TAPERED LONGITUDINALLY SLOTTED TUBULAR MEMBER AND A TAPERED CURVED WEDGESHAPED MEMBER FORMING THE COMPLEMENT OF SAID FORMING DIE AND ADJUSTABLE RELATIVE TO EACH OTHER FOR CONTROLLING THE PRESSURE OF SAID DIE OVER THE STRIPS, EACH CROSS-SECTION OF SAID DIE TAKEN ALONG THE LENGTH THEREOF
Claim 2
Dependent Claim 171 words
A MACHINE FOR COLLECTIVELY AND SIMULTANEOUSLY WRAPPING A PLURALITY OF FIBER GLASS STRIPS DISPOSED IN LENGTHWISE SUPERPOSED RELATION TO EACH OTHER AROUND A CORE OF BALSA WOOD HAVING AN ELLIPSE CROSS-SECTION FORMING A RAIL FOR USE IN A LADDER, SAID MACHINE COMPRISING, A MOUNTING FRAME, A MOTOR MUONTED ON SAID FRAME, A GEAR MECHANISM ACTUATED BY SAID MOTOR, A PLURALITY OF ROLLER MEMBERS ACTUATED BY SAID GEAR MECHANISM FOR IMPARTING A LONGITUDINAL MOVEMENT TO THE CORE AND TO THE STRIPS ATTACHED TO ONE END OF THE CORE, SPRING MEANS FOR PRESSING SAID ROLLER MEMBERS AGAINST THE CORE, A TWO-PART FORMING DIE MOUNTED ON SAID FRAME IN POSITION FOR ENGAGEMENT BY THE CORE AND THE STRIPS UPON THE OPERATION OF SAID ROLLER MEMBERS, SAID DIE CONSISTING OF A TAPERED LONGITUDINALLY SLOTTED TUBULAR MEMBER AND A TAPERED CURVED WEDGESHAPED MEMBER FORMING THE COMPLEMENT OF SAID FORMING DIE AND ADJUSTABLE RELATIVE TO EACH OTHER FOR CONTROLLING THE PRESSURE OF SAID DIE OVER THE STRIPS, EACH CROSS-SECTION OF SAID DIE TAKEN ALONG THE LENGTH THEREOF

References Cited (Backward Citations)

US2285263A Cited
US934683A Cited
US1932942A Cited
US2256263A Cited
US2343747A Cited
US2723705A Cited
US2714414A Cited
US2731067A Cited
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US3068134A Cited
US2777501A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1966-10-28 1967-04-29 1967-10-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1970-10-28 1971-04-29 1971-10-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1974-10-28 1975-04-29 1975-10-29 $7700.00 Window Closed / Lapsed

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