Improvements in Paper Folding Machines.
Year: 1889

page_text: Date of Application, 9th Oct., 1339-Accepted, 30th Nov., 1889
COMPLETE SPECIFICATION.
Improvements in Paper Folding Machines.
I, ROBERT CUNDALL, of the firm of Robert Cundall and Sons, of Shipley, in the
County of York, Machine Makers, 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 :-
This invention has reference to a prior application for Patent made by me on the
13th day of July 1889, No. 11256, for certain improvements in machines employed in
folding paper in sections, such as note paper and paper used for account books and
other purposes, the object of such said invention being to fold the paper so that when
it is laid down, it will lie flat and not open out of itself, and this I accomplished, in
such prior Patent, by giving to the folded paper an additional nip, but only at the
folded edge of the said paper; and my present invention consists in the employment
of a different form of mechanism to that described in my prior application, for putting
additional pressure to the folded side of the paper.
In carrying out my present invention, I employ any ordinary form of paper folding
machine, with or without nipping rollers, and under such nipping rollers or under the
ordinary "striker" of such machines I place a pair of eccentric rollers so timed as to
receive the folded edge of the paper when the surfaces of the two eccentric rollers
meet, so as to give to the said folded paper an additional nip or squeeze, which so
flattens the paper as to prevent the free edges from separating or opening out.
Instead of employing eccentric rollers, I may employ one or more moving jaws
operated by cam or eccentric for giving intermittent motion to the said jaw; or rollers
carried by hinged levers made to meet or come into contact intermittently by
cams or eccentrics for the purpose of nipping the said folded edges of the paper;
or the intermittent motion of the nipping devices may be operated by cranked
arms.
Such being the nature of my invention, I will now make reference to the accom-
panying sheet of drawings illustrative thereof, wherein A represents a portion of the
framework of the machine, B a pair of ordinary nipping or folding rollers, the paper
to be folded being inserted between the said nipping rollers by means of the "striker "C
working upon the fulcrum 1) arranged in the ordinary manner. My improvements are
shewn by letter E which comprises an additional pair of nipping rollers, the axles F
of which are placed eccentric to the said rollers so that as the said rollers revolve they
are timed to receive the folded side or edge of the paper F1 every time the outer
surfaces of the said eccentric rollers meet, as shewn in Fig. 1, which gives to the said
paper an additional nip or squeeze, but only at the folded edges thereof, which so
flattens the said paper as to prevent the free edges from separating or opening out.
The spur gearing for driving the nipping rollers B and eccentric rollers E is not
shewn, but it will be understood that the wheels will give the necessary speed
thereto.
Instead of employing eccentric rollers as shewn in Fig. 1, I may employ a hinged
lever G made to close intermittently against the part H by eccentric I which gives the
necessary nip to the said folded edges of the paper. The spiral spring
levers away from the part H.
draws the
Fig. 3 is a slight modification of Fig. 2, the action of the parts being the same.
Fig. 4 shews a pair of jaws K, hinged at L, closed at a given time by
eccentrics I and opened by springs; or box cams may be employed, which would
both open and close the jaws.
Fig. 5 is another modification of the means of giving intermittent motion to nipping
devices. In this case a crank and connecting rod M is employed to force part N

page_text: In Fig. 6 I have shewn the use of a pair of nipping rollers O, both of which are
carried on separate arms P working on a fulcrum Q. These rollers are caused to nip
at a given time by cams R, but the rollers are separated by springs J.
In some classes of paper folding machines a second pair of nipping rollers have been
employed to give the folded paper an extra nip, but the axles of these rollers have
been concentric with the rollers, and in practice it is found that such rollers have
glazed or put a gloss upon the paper, in consequence of the pressure upon the paper
lasting too long; but by employing eccentric rollers or intermittent nipping devices as
herein shewn and described, the paper is not glazed, as the nip or squeeze imparted to
the paper is only temporary or of short duration.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
Firstly. In paper folding machinery, the employment of eccentrically revolving
rollers for nipping or squeezing the sides or edges of folded sheets of paper as herein
described and shewn in Fig. 1.
Secondly. In paper folding machinery, the employment of intermittent squeezing
devices for nipping or squeezing the sides or edges of folded sheets of paper, as herein
described and shewn in the accompanying drawings.
Dated this 7th day of Ontahan 1880
TASKER & CROSSLEY,
Halifax, Agents.