Patent GB-190518134-A (GB)
Title: Improvements in Machines for Making Paper Bags.
Inventor: HESSER OTTO
Filed: 1905-09-07
Granted: 1906-03-01
Abstract: 18,134. Hesser, O. Sept. 7. Feeding sheets. - In an apparatus for pasting together pairs of paper blanks preparatory to folding them into double-walled paper bags, the sheets which form the outer walls in the finished bags are picked up one by one by means of a gumming ,or pasting stamp, and are transferred by it to a reciprocating carriage, which conveys them to the correct position for receiving the other blanks. The latter are lifted off a pi'e of blanks by means of a suction apparatus, which delivers them to reciprocating grippers which deposit. them upon the other blanks. Special means are provided to ensure that the blanks shall be picked up singly from either pile of blanks. The pasting- stamp 4, Fig. 2, which feeds the outer blanks into the machine is fixed to a horizontally and verticallyreciprocating, piece 6, which first causes. it to move horizontally over the pasting roller 7<a> and then vertically downwards to the top blank of the pile 3. As the stamp 4 again rises, it raises the top blank, the remaining blanks being retained by adjustable fixed scrapers 30. The .raised blank is stripped off the gumming-stamp by pivoted camactuated nippers 32, Fig. 31, which momentarily grip the raised blank against the fixed piece 2a, Fig. 2. The blank then rests upon the extension 39 of the horizontally-reciprocating carriage 31, Figs. 2 and 6, and is carried forward by it until the blank is arrested in the position for receiving the inner blank by the oscillating pivoted stop 45. Fixed side guides ensure that the blank shall assume the correct lateral position. The inner blanks are drawn off from the pile 62 by means of the apparatus shown in Fig. 21. One end of the top blank is first turned upwards by the rotation of the suction quadrant 53, which is swung through a right-angle by means of the rod 59 connected to the oscillating bell-crank lever 58. During this action, any suiplas blanks are removed by fixed scrapers 115 and pressed downwards on the pile 52 by the oscillating fingers 63. The quadrant 53 is then raised bodily for a short distance by means of rods 71 actuated by the eccentric-rod 68, and, at the same time, the other end of the blank is drawn up.- wards past the fixed adjustable scrapers 76 by the forked end 72 of a vertically reciprocating pipe. 73, which is connected with a suction pump bymeans of flexible tubing. The inner blank is then gripped against the piece 124 by the spring-pressed grippers 86<a>, mounted on a piece 89 which reciprocates just above the table 31, Fig. 6, upon which the outer blank rests. Inclined pieces 95 press against, the under surfaces of the inner blank and prevent it from dragging over the gummed surface of the outer blank. When the piece 89 has carried the inner blank into its correct position over the outer blank, the arm 126 strikes a fixed stop, and turns the grippers 86<a> into the position shown, thus releasing the inner blank. The spring pressed pawl 120, pivoted at 122, retains the grippers in their raised position until they are in position to receive, another blank, when they are released by the descending piece 72 striking the arm 123 of the pawl. A vertically-oscillating piece 96, Fig. 6, operated by the pivoted lever 103, is provided to ensure that the inner blank assumes its correct position when the two blanks are required to be displaced relatively as shown in Fig. 34. The lever 103 also oscillates a vertically-sliding piece 106 having projections 108, which prevent the return of the two blanks when the carriage 31 makes its return stroke. This motion is also prevented by means of two oscillating pieces 109, pivoted at 130, which are actuated by the eccentric-rod 129 in such a manner that they bear against the rear side of the blanks during the return motion of the carriage 31. When the carriaga 31 makes its next forward. stroke, projections on it push the pasted blanks forwards until they are engaged by the conveyerrollers 111. The piles of blanks 3, Fig. 2, and 62,. Fig. 21, are automatically raised by rack-and-pinion or other mechanisms operated respectively from the gumming-stamp 4 and the suction lifting-piece 72.. The fingers 63, Fig. 21, may be made in the form of jets to which a current of air is supplied for assisting the separation of the superfluous blanks.