Improvements in Means for Bending Cardboard for Making Boxes..
Year: 1896

page_text: Date of Application, 14th Oct., 1896-Accepted, 5th Dec., 1896
COMPLETE SPECIFICATION.
Improvements in Means for Bending Cardboard for Making Boxes..
I, WILLIAM SAUNDERS of 26 Helmet Row, Old Street, London Box Maker
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 object of this invention is the production of a tool capable of being attached
to any machine, or apparatus having a traversing slide and a fixed table (such as a.
scoring table, or rotary scoring machine) that will bend cardboard without needing
a score cut; thus preserving the full strength of the material at the bend.
This I accomplish in the following way, viz.; A tool, as per drawings, is formed.
of metal, wood, or any other material suitable for the purpose. The tool consists.
of two parts, A and B Figs. 1 and 2. The part A is formed with a recess on one
edge, as seen at C. Fig. 2, and by the dotted line D Fig. 1. The two flanges thus
formed are reduced from the full depth at E. Fig. 1, to nil at each end of the
recess as seen at F. F. Also the recess is widened out from center E to each.
end F. F. as seen in Fig. 3, to suit the different kinds of material requiring to be
bent. The sections of the flanges seen at 1. 2. 3. 4. and 5. Fig. 3 represent the
sectional form of the recess at the respective dotted lines 1. 2. 3. 4 and 5.
The part B is a straight edge, having the upper edge rounded off, to fit into the
recess on the edge of A, as seen at C Fig. 2, allowing space between equal to the
thickness of the material to be bent. The length of the straight edge B must be
made equal to the longest bend required.
To use the tool the part B is made a fixture to the table or frame of the machine-
or apparatus utelized, so as to fit into the recess in A. The part A is attached to.
the traversing part of the adopted machine by means of the two holes shown at G.
Fig. 1, or by any other suitable means.
The bending is effected by placing the cardboard to be bent on the straight.
edge B, and then sliding the part A over and along the board, under a certain
amount of pressure, when a bend in the card, as shewn at Fig. 4 will be produced.
In some cases it is intended to reverse the process by making both parts of the
tool, A and B, a fixture, in their proper position for doing the bending, and
drawing the material to be bent through the tool by means of rollers or other
suitable appliance.
I do not confine myself to the particular form of recess shewn at C Fig. 2, but.
claim to modify the sectional form, and, also to modify the flanges so as to adapt
the tool for being fed by rollers. In which case the part A is formed as shewn at
Fig. 5; the flanges being of the greatest depth at H, and nil at I, and the straight
edge B will be reduced in length .to a little over that of the part A. In this
application of the tool A and B are intended to be a fixture, and the material
drawn through the tool by means of rollers.
I also claim to modify the recess on A so as to adapt the tool for turing up.
flanges on the bottoms of circular boxes. This I purpose doing by making the
recess of a curvated form, as seen at the dotted line L Fig. 6; and have but one
flange as shewn at N Fig. 7. M represents a portion of a revolving roller, around
which the material to be bent is driven by means of another roller acting against
the roller M. A being a fixture, a flange is bent down on the cardboard, as seen

page_text: at O. Fig. 7. Fig. 8 represents the flange of A as thus modified. Figs. 9. 10.
and 11 shew the section of A at the respective Nos. 1. 2. and 3. Fig. 8. The
dotted lines shew the extent to which the flange is reduced at those respective
places.
I do not intend to confine the dimensions of the tool or its parts to the precise
measures laid down in the drawings, but to vary the proportions to suit the
particular material requiring to be bent.
Having now particularly discribed and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. The process of producing the bend gradually and successively, from nil to the
full bend by means of sliding the tool over the material or by drawing the material
through the tool, in lieu of making the entire bend by a single blow, or a single
squeeze.
2. The tool discribed in this specification, and represented in the drawings, with
the respective modifications therein discribed, apart and distinct from any appliance
by which it may be worked.
Dated this Fourteenth dex of October 1896
WILLIAM SAUNDERS.