A Machine for Trimming Paper.
Year: 1896

page_text: Date of Application, 19th June, 1896-Accepted, 19th July, 1897
COMPLETE SPECIFICATION.
A Machine for Trimming Paper.
I, ROBERT NOBLE ADAMS of 31 Moray Place Dunedin, in the Colony of New
Zealand, Publisher, 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 :--
My invention relates to improvements in Machinery for Paper trimming, in which
paper in the form of sheets, l'amphlets, Newspapers, and such, are passed between
rollers, and have their edges trimmed by circular knives, revolving with, and at the
ends of, the rollers, which can be adjusted to the required sizes of the paper, as far as
the top and bottom edges are concerned; and if the front edge is also to be trimmed,
the paper is passed through another pair of rollers, fixed at right angles to the first
pair, by automatic action, and is delivered out at the side of the machine.
Referring to the accompanying drawing:-
Figure 1, is a sectional elevation of the machine, with part of the framing removed,
to shew the passage of the paper between the tapes to the knives, more clearly.
Figure 2, is a plan of the entire machine, shewing the rollers with the circular
knives at both ends, for trimming the top and bottom edges of the paper, and also
the rollers at right angles, having one pair of knives, for trimming the front edge of
the paper.
Figure 3, shews the arrangement of feed rollers, pulleys and tapes for the second
set of rollers.
A, and B, are the rollers made up in lengths for convenience, shewn as two broad,
and two narrow ones, the rollers A, being fixed to their shafts, but capable of
adjustment, for different widths of paper, the upper ones B, having the inside rollers
fixed to their shafts, and the outer ones kept pressing against them by springs C,
adjustable to a sufficient pressure by screws and nuts, for keeping the knives in
contact as scissor blades, but revolving and D, are stops adjustable for preventing the
upper knives K, K¹, K", from shooting over the rollers A, A¹, A, and so getting the
edges damaged, when too great a thickness of paper is inadvertently fed in.
To distinguish the parts that occur more than once in the saine machine, and also
a slight modification of same, in Figure 4, where the top knives run faster than the
lower ones, to give a rubbing cutting action to the knives; the parts are marked
with plain letters for the first set, with letters and marks (such as A,) for the second
set, and with letters and two marks for the modification (such as B).
As it is désired to have the knives pressing against each other, it is obvious that
the action is the same whether the upper knives K, are pulled in by a set of
springs, C, or the lower ones are pushed by a spring, or set of springs, and if the
latter plan were adopted, instead of the bolts D, there would be a washer outside the
roller carrying the lower knife at each end, namely at K, K¹, K¹¹
The paper is fed from a table on to the tapes E, E, and to the guide F, it passes
round the two rollers G, G, to the rollers A, and B, where the edges are trimmed by
the knives K, (on the lower roller) and K, (on the upper roller,) and it is carried
along the tapes E", E", to the small upright rollers J, J.
The paper is now in the position as seen in Figure 3, over one of the rollers G1,
and the edge under the two small rollers on arms, I, I, which descend by any eccentric

page_text: or cam motion (such as L) so as to press the edge of the paper marked P, against the
roller G, and the paper is drawn in through the second set of rollers A', B1, by the
tapes E1, E1, and the front edge is trimmed by the knives K', K'.
The pulleys on arins H, HI, are for tension of the tapes, and run easily on the ends
of the sliding bars as shewn. The side, or second set of rollers are geared to run
faster than the first set, to clear a paper from one following. The knives K, K¹, K",
have one knife, preferably the under one, the same size as the roller to which it is
attached the other larger, to overlap; the larger one is ground to the keenest edge.
The bottom rollers A, A¹, A", run in solid bedded
solid bedded bearings the top
rollers B, B1, B1, are held down by springs, dotted in Figure 1, for relief in case the
machine is overfed.
When fine trimming is required, the top knives are driven faster than the rollers
next them, this is shewn in Figure 4, where the spindle is shewn geared to run about
twice as fast as the rollers; the rollers B, are caused to run loose and slower on their
shaft or spindle, and the upper knife K¹, is secured to the spindle by a collar and nuts
as shewn dotted in Figure 4, collars keep the rollers in position, the upper knife is
made plain as shewn in Figures 1, and 2, or it may be made for convenience in two
parts held together by means of a washer as shewn at C, Fig. 4.
When the rollers and knives work at the same speed all are fixed to the spindles
carrying them, but generally so as to be adjustable.
The machine may be driven direct from the end of the spindle of the rollers A, or
by gearing, from another shaft.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what I
claim is
1. In a machine for trimming paper, the combination of rollers (such
as A, A, A, B, B1, B",) having circular revolving knives secured at, one or both
ends as needed, (such as K, K', K",) with tapes (such as E, E, E',) guide
rollers (such as G, G, G1, G',) and adjustment pulleys (such as H, H',) and automatic
feed rollers (such as I, I¹) worked by cambs (such as L, L,) substantially as
described and explained and as illustrated in the accompanying drawing.
2. The method of trimming paper in and by a machine consisting of rollers,
circular knives, and feed gear in which one or two sets of such rollers are used, as
described and explained and as shewn in the drawing.
3. The method of keeping the upper knives pressing against the lower ones, by
springs (such as C, C, C,) and preventing their riding by distance bolts (such
as D, Di, D,) and the method of feeding to the second set of rollers by the
pulleys I, I, in a machine for trimming paper, as described and shewn.
Dated this 2nd day of March 1896