Manufacture of Driving Belts from Paper.
Year: 1891

page_text: Date of Application, 25th Mar., 1891-Accepted, 9th May, 1891
COMPLETE SPECIFICATION.
Manufacture of Driving Belts from Paper.
I, ADOLF LUDVIG LÖNNERBERG of 8 Kungsholmgatan, Stockholm, Sweden,
Engineer do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement :-
The paper to be used for these beltings or belts is made in the usual manner
either of rags or other suitable material. The paper which, if desired, may be
parchmentized before using it, is pasted together to the desired thickness in greater
or smaller widths. An adhesive glue or paste is used, which should be made
insusceptible of moisture, which can be effected by adding or treating it with alum,
chromic acid, chromate of potash, tannic acid sugar of lead or the like. Gutta
percha or india-rubber may also be used in the glue mixture. The paper is
preferably made as long as the belting required to be manufactured, but there is
obviously no obstacle to one or more joints being used in the single paper bands.
Likewise it is obvious that to commence with, a wider band may be manufactured,
Likewise
which may then be cut into narrower widths suitable for beltings.
so-called endless beltings may be made. The belting may, in order to become more
durable, be subjected to a kind of tanning by tannic acid, chromic acid or the like. In
order to make the belting pliable, if it is to run over small pulleys, it may be subjected
to a mechanical softening process by bending it in opposite directions between jaws
or the like or by causing it to run over or to be drawn forcibly under rollers of
small diameters, so arranged that the belting at every new roller is bent in another
direction than at the previous one.
The belting may be impregnated with glycerine or the like in order to keep it
soft.
Finally the surface of the belting, in order to be still more protected from
moisture and wet, should be provided with a protecting coating or impregnation
with for instance paraffine, vaseline, linseed oil or the like. These beltings when
wide, are preferably perforated but not so as to weaken them to a material
extent.
Evidently the paper may also be made immediately of the thickness wanted for
the beltings, and this paper may be impregnated, coated and treated as already
stated.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Beltings made of paper bands laid one upon the other and pasted together by
means of some adhesive made insusceptible of moisture by adding to the adhesive
alum, chromate of potash, chromic acid, sugar of lead or other matter suitable for
rendering the glue non-hygroscopic.
2. The mode of manufacture of beltings consisting in pasting paper bands of the
desired width together to a suitable thickness by means of an adhesive rendered
insusceptible of moisture by adding to it alum, chromate of potash, chromic acid,
sugar of lead or other matter suitable for rendering the glue non-hygroscopic.
Dated this 25th day of March 1891
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.