. Rubber hand stamps and the manipulation of rubber; a practical treatise on the manufacture of India rubber hand stamps, small articles of India rubber, the hektograph, special inks, cements, and allied subjects . e the plunger a good coating of talc, and it mustbe made to sit vertically. The arrangement of acylindrical hole shown in the cut secures this resultperfectly. As distance piece a pin is passed throughthe plunger. Cane and Chair Leg Tips, etc.—By carrying outthe process just described with larger moulds and ofslightly different section very convenient tips forchair legs and walking
. Rubber hand stamps and the manipulation of rubber; a practical treatise on the manufacture of India rubber hand stamps, small articles of India rubber, the hektograph, special inks, cements, and allied subjects . e the plunger a good coating of talc, and it mustbe made to sit vertically. The arrangement of acylindrical hole shown in the cut secures this resultperfectly. As distance piece a pin is passed throughthe plunger. Cane and Chair Leg Tips, etc.—By carrying outthe process just described with larger moulds and ofslightly different section very convenient tips forchair legs and walking canes can be made. Suchtips can be modified in size and thickness to answeras covers for the mouths of bottles, test-tubes, etc. Corks.—These mav be made in moulds tapering AND THE MANIPULATION OF RUBBER. 01 from top to bottom. The India rubber must bepacked in with great care to secure as solid filling aspossible. A pliniger is used that enters the largerend and is a very little smaller in diameter, so as todescend a little way into the mould. This distancedetermines the length of the cork. As the perim-eter of the plunger strikes the walls of the mouldit cuts off almost completely the excess of rubber. Mould fur Ruuber Corks. that has squeezed up past it. An excellent modifi-cation of the mould is shown in the cut. Theupper part with parallel sides serves as a guide forthe plunger. It is a similar extension as the onerecommended to be used for the plunger in the hol-low pencil and chair leg tip moulds just spoken of. Mats.—These may generally be made in the hotpress. Designs for them in great variety may befound in cut glass and pressed glass dishes. Many 92 RUBBER HAND STAMP MAKING of these have patterns on their bottoms that can bemoulded in plaster to serve as matrices. Cord, Thread cmd Seamless Tube.—By placing themixed india rubber in a cylindrical mould fittedwith piston and with one or more round holes in thebottom, the material may be softened by heat andforce
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidrubberhandstamps01sloa
