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US3793138A Expired / Lapsed US ⏱️ 0.0 years remaining

System for depositing fibers from a suspension onto a hollow, perforated mold wherein a movable head applies suction from within the mold

Assignee: Individual
•
Filing: 1972-01-28
•
Granted: 1974-02-19
•
Expires: 1992-01-28
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Abstract

Abstract The present invention relates to a process for depositing a predetermined thickness of fibers upon the surface of a mold comprising, moving a slurry supply container into surrounding relationship with a perforated hollow mold, filling the slurry supply container with a fibrous slurry, moving a suction head into the interior of the hollow mold, pulling a suction through the suction head to cause fibers from the slurry to be deposited on the outside of the mold, moving the suction head so as to pull a suction on an additional area of the mold. A device is provided for carrying out the process comprising a container for holding a fiber suspension therein, a suspension arrangement for holding a hollow mold, cylinders and piston rods for moving the container into surrounding relationship with the hollow mold, a slidably movable suction head extending into the container for insertion into the hollow mold therein, cylinder and sleeve for moving the suction head (and suction pipe connected thereto) in sealing relationship into and out of the interior of the hollow mold for accreting fibers onto the outside surface.

Inventors

  • 👤 E Rohrer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 20:33
CPC Classifications
D; D21; D21J; D21J7/00

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 30 words
The process of claim 1 including the steps of moving said suction means to include additional areas of said hollow mold, and pulling said suctions for different lengths of time.
Claim 2
Independent Claim 86 words
A device for forming a deposit of fibers on a mold comprising container means for holding a fiber suspension therein, holding means for holding a perforated hollow mold, means for moving said container means into surrounding relationship with a hollow mold, a slidably movable suction means extending into said container for insertion into a hollow mold therein, means for moving said suction means in sealing relationship into and out of the interior of said hollow mold for accreting fibers onto the outside surface of hollow mold.
Claim 3
Dependent Claim 59 words
The device of claim 3, wherein said perforated hollow mold has an opening allowing for access to the interior thereof and is held by said holding means, and said suction means is a plate shaped suction head of sufficient dimension to extend into said opening with its periphery in a sealing relationship with the interior surface of said mold.
Claim 4
Dependent Claim 34 words
The device of claim 3, wherein the suction head is provided with a rigid suction pipe guided shiftably through the bottom of the container, and said suction pipe is in communication with said head.
Claim 5
Dependent Claim 30 words
The device of claim 5, wherein the suction pipe is provided with ram means attached to the container for slidable movement of said pipe and head longitudinally of said container.
Claim 6
Dependent Claim 29 words
The device of claim 6, wherein the container is provided with ram means for vertical movement thereof and said container in its upper most position surrounds within said mold.
Claim 7
Dependent Claim 27 words
The device of claim 7, wherein the container has a discharge pipe with a regulating element therein for regulation of the through flow quantity of fiber suspension.
Claim 8
Dependent Claim 13 words
The device of claim 8, wherein the mold has areas which are non-porous.
Claim 9
Dependent Claim 18 words
The device of claim 9, wherein the deposition surface of the mold is coated with a plastic layer.

References Cited (Backward Citations)

US2159638A Cited
US3016090A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-18 1977-08-20 1978-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-18 1981-08-20 1982-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-18 1985-08-20 1986-02-19 $7700.00 Window Closed / Lapsed

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