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US3799728A Expired / Lapsed US ⏱️ 0.0 years remaining

Mold closing device for fabric molding

Assignee: International Fabric Molders Inc
•
Filing: 1972-05-18
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Granted: 1974-03-26
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Expires: 1992-05-18
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Abstract

Abstract A mold closing device which supplements the normal mold closing action of a press for fabric molding. The device comprises a pair of pistons and cylinders extending horizontally beneath a support member on which mold parts are mounted for vertical movement. The cylinders and pistons are pivotally connected to pairs of lower and upper lever arms, the outer ends of which are pivotally connected to the press and to the four corners of the support member respectively. The cylinders are operated to move the pistons horizontally and exert vertical pressure upon the support member through the pivoting arms to cause sudden forceful closing of the molds.

Inventors

  • 👤 J Howard

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 18:42
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/10; B30B1/16; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/38

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 265 words
In a molding press for use in molding flat pieces of fabric into three dimensional shapes for use in garments, in which mold parts are mounted on a movable substantially rectangular support member for vertically upward movement by a main hydraulic ram into a closed position with respect to complementary stationary mold parts, the improvement comprising a mold closing device which supplements the normal mold closing action of said ram, said device including a pair of hydraulically operated cylinders and reciprocable pistons extending substantially horizontally beneath the front and rear edges of said support member, each of said cylinders having a pair of diagonally directed upper arms pivotally connected at their outer ends to said support member adjacent to the opposite corners thereof and having their inner ends pivotally connected one to said cylinder and one to said piston for outward movement thereby, each of said cylinders having a pair of diagonally directed lower arms pivotally connected at their outer ends to fixed portions of said press on opposite sides thereof and having their inner ends pivotally connected one to said cylinder and one to said piston respectively, and means for energizing both of said cylinders simultaneously after said support member has been moved to a substantially closed position with respect to said stationary mold parts, to provide sudden forceful and equal final closing movement of all four corners of said support member to force said support member and the fabric being molded against said stationary mold parts and thereby provide a stronger molding action and better definition of the molded configuration of the fabric.
Claim 2
Dependent Claim 265 words
In a molding press for use in molding flat pieces of fabric into three dimensional shapes for use in garments, in which mold parts are mounted on a movable substantially rectangular support member for vertically upward movement by a main hydraulic ram into a closed position with respect to complementary stationary mold parts, the improvement comprising a mold closing device which supplements the normal mold closing action of said ram, said device including a pair of hydraulically operated cylinders and reciprocable pistons extending substantially horizontally beneath the front and rear edges of said support member, each of said cylinders having a pair of diagonally directed upper arms pivotally connected at their outer ends to said support member adjacent to the opposite corners thereof and having their inner ends pivotally connected one to said cylinder and one to said piston for outward movement thereby, each of said cylinders having a pair of diagonally directed lower arms pivotally connected at their outer ends to fixed portions of said press on opposite sides thereof and having their inner ends pivotally connected one to said cylinder and one to said piston respectively, and means for energizing both of said cylinders simultaneously after said support member has been moved to a substantially closed position with respect to said stationary mold parts, to provide sudden forceful and equal final closing movement of all four corners of said support member to force said support member and the fabric being molded against said stationary mold parts and thereby provide a stronger molding action and better definition of the molded configuration of the fabric.
Claim 3
Dependent Claim 33 words
The structure described in claim 1, and a plate connected to the outer end of each of said cylinders and pistons, the inner ends of said arms being pivotally connected to said plates.
Claim 4
Dependent Claim 49 words
The structure described in claim 2, and a pair of rollers mounted on the upper and lower portion of each of the four corners of said support member, said rollers being engageable with vertically directed stationary portions of said press to facilitate the vertical movement of said support member.

References Cited (Backward Citations)

US27137A Cited
US2680893A Cited
US3000429A Cited
US3335463A Cited
US3327622A Cited
US3559235A Cited
US3667890A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-03-25 1977-09-24 1978-03-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-03-25 1981-09-24 1982-03-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-03-25 1985-09-24 1986-03-26 $7700.00 Window Closed / Lapsed

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