Patent GB-461451-A (GB)
Title: Apparatus and process for treatment of lengths of flexible material
IPC: D06B3/02
Filed: 1935-11-21
Abstract: <PICT:0461451/IV/1> Lengths of flexible material such as cloth and paper are continuously impregnated with a volatile solvent and then dried in an apparatus comprising in communication with each other an impregnation chamber, a drying chamber, in which the material is dried by a current of air, and an exchange chamber in which the vapour of solvent drawn from the outgoing treated material is again carried back into the apparatus by the incoming untreated material by passing these parts in closely spaced parallel relation for a substantial distance.  In the apparatus shown, the fabric is fed at 18 over a heating surface 21 into an exchange chamber 12 past a heating surface 20.  It then passes through an impregnation chamber divided into two parts 4, 5 by a partition 2. Fresh solvent may be caused to flow into the compartment 5 through an inlet 7 against the direction of movement of the material over the partition 2 and out at an outlet 8.  The lower guide rollers 15, under which the material is guided, are caused to oscillate in a horizontal plane in a direction transversely of their axes.  The drying chamber 6 adjacent the impregnation chamber has heating surfaces 16 which may serve also as baffles to direct the current of drying air parallel to and in the opposite direction to the moving material.  The spaces between the baffles 22 are covered by movable lids 17.  The exchange chamber is a narrow extension of the drying chamber and the outgoing material is fed close to the incoming material as shown.  Specification 423,484 is referred to.ALSO:<PICT:0461451/III/1> Lengths of flexible material such as cloth are continuously impregnated with a volatile solvent and then dried in an apparatus comprising in communication with each other an impregnation chamber, a drying chamber in which the material is dried by a current of air, and an exchange chamber in which the vapour of solvent drawn from the outgoing treated material is again carried back into the apparatus by the incoming untreated material by passing these in closely spaced parallel relation for a substantial distance.  In the apparatus shown, the fabric is fed at 18 over a heating surface 21 into an exchange chamber 12 past a heating surface 20.  It then passes through an impregnation chamber divided into two parts 4, 5 by a partition 2.  Fresh solvent may be caused to flow into the compartment 5 through an inlet 7 against the direction of movement of the material over the partition 2 and out at an outlet 8. The lower guide-rollers 15, under which the material is guided, are caused to oscillate in a horizontal plane in a direction transversely of their axes.  The drying chamber 6 adjacent the impregnation chamber has heating surfaces 16 which may serve also as baffles to direct the current of drying air parallel to and in the opposite direction to the moving material.  The spaces between the baffles 22 are covered by movable lids 17.  The exchange chamber is a narrow extension of the drying chamber and the outgoing material is fed close to the incoming material as shown.  Specification 423,484 is referred to.