USRE7206E - Improvement in lumber-driers - Google Patents

Description

UNITED STATES PATENT OFFICE.

PHILIPP PFEFFER, 0F NEW YORK, N. Y.4 i

IMPROVEMENT IN LUMBER-DRIERS.

Specilieation forming part of Letters Patent No. 163,403, dated May 18, 1875; reissue No. 7,206, dated July 4, 1876; application nieu June 24, 1876.

To all whom it may concern:

Be it known that I, PHILIPP IFEFEER, of

' the city, county, and State of New York, have the accompanying drawing, forming part o f this specilication, in which- I 1 Figure 1 represents a vertical longitudinal section of my improved press lor drying lumber. Fig. 2 is a side view ot' the same, partly in section, to show grooved and pertbrated face ofpress-plates, and Fig. 3 is a detail view of the interior side of the grooved and perforated face-lining.

My invention relates to an improved apparatus for drying lumber of varyingthickness within short time by the influence ol' pressure and heat; and it consists in introducing the boards or other pieces of lumber between press-plates heated by steam, and provided with a perforated face-lining, with connecting grooves at the inner side, for admitting the escape ot' the moisture in the lumber.

In the drawing, A represents the pressplates ot myimproved lumber-drying machine, which are made hollow, and of suitable size and strength, according to the size of lumber to be dried thereby. The plates are heated by permitting steam to enter at one side and leave at the opposite side. The press-plates A are provided with additional face plates or lining B, of brass, copper, or other material,

vand screwed or otherwise attached thereto. The face-linin g B has anumberofperforations,

capable of being instantly worked up in. the' trades, thus doing away with the expensive modes of seasoning and drying lumber here1 tot'ore used. I have found by actual tests that boards of one inch in thickness are com- I'iletelyseasoned by being exposed for about ten minutes to the combined pressure and steam action of my press. r[he cessation of the issuing of any steam from the channels indicates when the process ot' drying is completed.

Having thus described my invention, what I claim as new is- 1.r In an apparatus for drying lumber, pressplates adapted to be heated, and having vents opening upon their opposing faces, for the escape ot' the vaporized moisture ot' the wood, substantially as described.

2. In an apparatus for drying 1umber,`hol low press-plates adapted to be heated bysteam, and having vents opening upon their opposing faces, for the escape ot the vaporized moisture of the wood, substantially as described.

l 3. In an apparatus for drying lumber, the combination of the heated press-plates with face or lining plates having pert'orations and connecting-chan nels, for the escape of the vaporized moisture of the wood, substantially as described.

4. In an apparatus for drying lumber, the combination ot' hollow steam-heated pressplates A and face or lining plates B, having perforations and connectin g-ehan nels between press-plate and lining, for the escape ot' the vaporized moisture ofthe Wood, substantially as herein shown and described.

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