Patent GB-189922254-A (GB)
Title: Improvements in the Art of and Apparatus for Making Paper Tubes.
Inventor: RANSFORD ROBERT BOLTON
Filed: 1899-11-07
Granted: 1900-10-06
Abstract: 22,254. Ransford, R. B., [White, J. H., and White, E. L.]. Nov. 7. Paper tubes, making. Relates to method and means for making paper tubes. The method consists in the main in folding a paper strip into tubular form, and subsequently subjecting the tube or body to heat while held firmly so as to effect a setting of the lapped parts, and the apparatus, as shown in Fig. 2, comprises the gumming or glueing apparatus C<2>, the former E with the mandrel D, the folder F, the hollow matrix G which is,heated, and the guide-way H, the cutter R, and the mechanism U for coating the tube, together with the various working parts. The glue holder C<2>, Fig. 4, is mounted on an adjustable bracket so that the feed of the glue may be regulated, and is screwthreaded so as to be adjustable vertically. The passage of the glue is regulated by the valve, which is adjusted by the thumb-nut C<4>. The paper strip is guided along the underside of the mandrel D to the former E, Figs. 10 and 11, which may turn freely or move longitudinally on the mandrel. The set-screw e<1> bears on the mandrel, and clamps the former and mandrel together. The U-shaped perforation e has the horn e<3> enlarged in order to allow the glued edge to pass without injury. After passing through the former, the strip enters the folder or guide F. The folder is of well-known construction, and is so pivoted to the machine frame that it can adjust itself with relation to the mandrel, the former, and the heater G. The heater is preferably weighted in the upper section, which is hinged so that it may be raised or lowered. Any suitable heater may be employed, but an electrical heater is preferred. The tube enters the grooves g<1>, g<2>, Fig. 8, of the mould or heater, where it is set and the glued edge dried. When it is desired to insert the tube into the grooves or "thread the machine," the shaft G<8> is rocked, with the result that the bar G<2> is raised and the former thrown out of action. After the tube is formed it traverses reciprocating feed-clamps which at each revolution draw the paper forward a predetermined distance. The feeding-device preferably consists of two clamps, Fig. 14, grooved to fit the tube, and the paper when clamped is fed forward by the pivoted segment H<7>. The segment is oscillated from the cam-groove m, Fig. 15, on the disc M<3>. The rocking is slowest at the start and finish of the stroke. The external cam h<12> operates the bell-crank lever H<8> for closing the upper clamp on the tube. Another method of clamp feeding consists in swivelling or pivoting the clamp sections upon links the centres of which are pivoted to a slide bar. In this form of feed, a setscrew or other means allows of the regulation of the movement of the upper clamp and so of the pressure. The upper clamp has its surface roughened. The mandrel is preferably extended so that its end is coincident with the plane of cutting of the knife R. The knife is attached to the slide bar R', and is raised by the cam M' acting on the lever R<2>. Each tube, after being severed, is coated or saturated with waterproofing or strengthening material. The coating-mechanism consists of a receptacle formed with a bottom socket filled with felt or other substance and having an opening for the tube. The felt absorbs the coating- substance, and the flow to it is regulated by a spindle valve.