Patent GB-190323607-A (GB)
Title: Improvements in Machinery for Drying or Carbonizing Fibrous or other Material
Inventor: FIELDEN JOHN
Filed: 1903-10-31
Granted: 1904-10-31
Abstract: 23,607. Fielden, J. Oct. 31. Carbonizing fibres.-Relates to apparatus of the kind described in Specification No. 10,632, A.D. 1894, though the improvements are applicable also to other drying-apparatus. The improvements consist, firstly, in providing means whereby the material is fed into the drying-chamber without the admission of cold air. For this purpose, the material from the feeding-trough d, Fig. 1, passes under a plain or fluted roller a, mounted in guides, and upon a lever b, which turns upon a pin c, and is adapted to rise and fall as the material passes under it. The roller is suitably balanced more or less by a spring g, upon a spindle h, mounted on the bracket i. The roller is situated over the opening e in the tube f, through which hot air is supplied by a fan, for conveying the material up into the drying-chamber, and, when material is being fed through the opening e, pressure is exerted upon it by the roller, and the opening e is closed to the admission of air. The tube f terminates at the position of the top conveyer f<1> Secondly, the improvements consist in an arrangement of squeezing-rollers j, j<2>, Fig. 2, whereby the material is separated from the liquid which it may contain, previous to its being passed by a revolving stripper k into the tube f. The material is fed directly into the tube f by the stripper k, which is arranged wholly within the tube ; the back part of the rollers are also situated within the tube. As the material is fed by the stripper into the tube, it is forced by the air up on to the conveyer. The casing covering the stripper may be closed in as shown, or it may be provided with a sliding piece. Improvements in the construction of the conveyers consist in the employment of wire rings for securing the nuts upon the fixing-screws, which connect the conveyers to their supporting-bars. To prevent the escape of hot air and loose fibres from the apparatus, a coverplate o, Figs. 4 and 5, is secured to the conveyer by lugs p at the point where the supporting-bars project beyond the machine casing. The cover-plates move with the conveyer, in close contact with the inner side of the casing, and effectually close the opening through which the bar passes. Bars or cross-pieces are arranged beneath the conveyers, in connection with the supporting-rods throughout the length of the conveyer, for preventing the accumulation of material around the supporting- rod. The current of air is also confined within the compartments formed by the cross-pieces. A form of conveyer applicable to drying-machines of this type consists of a series of channels w, Fig. 11, the sides of which have their upper edges serrated. Some of the channels are connected to a cross-bar and are adapted to receive a reciprocating motion from a rod v, which is attached to a revolving disc u, while others are fixed to stationary cross-bars. The movable conveyers are mounted on rollers y<3>, y', which are fixed to the cross-bars, and run on rails y<5>. If desired, the whole of the channels may be made movable, but the movements must be such that the material is carried towards the delivery end of the conveyer, from which it falls on to the conveyer below it. The material is fed on to the upper conveyer from the inclined plate z. The channels allow for the free passage of air beneath the material, and the air supply is further augmented by providing the bottoms of the channels with perforations.