. 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 . shape ofa shallow letter V may intervene between nuts andplaten, the centre of the bend bearing against thecentre of the platen. As regards the strength oi the springs there isthis to be said. The distance pieces will prevent aspring that would ordinarily be too powerful fromdoing any harm. Such distance pieces should beused, as the springs must be based upon giving apressure of man
. 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 . shape ofa shallow letter V may intervene between nuts andplaten, the centre of the bend bearing against thecentre of the platen. As regards the strength oi the springs there isthis to be said. The distance pieces will prevent aspring that would ordinarily be too powerful fromdoing any harm. Such distance pieces should beused, as the springs must be based upon giving apressure of many pounds per square inch of surfaceto be acted on. They should have a range of aneighth of an inch or more. The greater the rangethe more evenly will they work. The next cut shows an excellent little screw press,that is made for the purpose of pressing vulcanizingflasks. This is so simple that it will suggest to the 52 nUBBER HAND STAMP MAKING mechanical reader how he can make a single-screwpress, which is by far the most convenient to the stationery stores very small model cast ironcopying presses designed for nse as paper weightsare sold. They are excellent for a limited amountof small sized Vulcanizing Flask Clamp. A large sized gas heated press, such as made forthe purpose of manufacturing rubber stamps, isshown in the next cut, p. 53. Its construction isobvious. It is termed by the trade a vulcanizer. Itsmanipulation will be given furtlier on. Type are generally the object to be are best set up with high quads and rather a large type is chosen, with extrawide spaces between the letters. Some advise rub-bing the type faces full of hard soap, afterwardsbrushing off the face, leaving the hollows wax is recommended for the same pur- AND THi£ MANIPULATION OF RUBBER. 53 pose. This prevents the plaster of the matrix en-tering so deeply into the cavities of the letters. The type forming the model to be reproduced, isloc
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidrubberhandstamps01sloa
