Improvements in Means or Mechanism for Seaming and Joining Sheet Metal, the same being especially applicable for Use in the Manufacture of Boxes, Canisters, or the like.
Year: 1896

page_text: Date of Application, 4th Apr., 1896
Complete Specification Left, 4th Jan., 1897-Accepted,. 13th Feb.. 1897
Improvements in Means or Mechanism for Seaming and Joining
Sheet Metal, the same being especially applicable for Use in
the Manufacture of Boxes, Canisters, or the like.
We, WILLIAM ARTHUR CRABTREE and DAVID CRABTREE both of Wrose
Brow Works, Windhill, Shipley in the County of York, Machine Makers and
ALBERT SHAW of the same place, Manager, do hereby declare the nature of this
invention to be as follows, that is to say :-
It relates to improvements in means or mechanism for seaming and joining or
bending and folding sheet metal, the same being especially applicable for use in the
manufacture of boxes, canisters or the like wherein the bottom or top part has to
be secured to the body part by being bent or folded upon or seamed on " and our
said invention consists in the novel and peculiar formation of jaws or clamping
pieces, arranged to be used in the well known type of squeezing or pressure
machine, whereby the sheet metal parts are bent upon one another to form the
well known double seam or joint with a two fold grip and that in an expeditious
manner and without leaving any part unfolded bulged, or irregular, but so that the
joint thus made shall be even throughout its entirety.
To attain this object we make use of the well known kind of squeezing or pressure
exerting machine wherein several jaws or clamps are arranged to move in a path
converging in a given centre or move towards and from each other in paths at
equal distances one from another, the same being operated by crank or pedal
mechanism as is well understood. However instead of the jaws or clamping pieces
being merely made to conform to the contour of the box, canister or the like which
they have to operate upon, these jaws are so formed to overlap each other that
throughout the entire paths of their respective motions each jaw is in sliding contact
with its neighbour, thus a perfect and complete joint is at all times maintained
between one jaw and the other by which there is no open space left for any part of
the sheet metal being acted upon to recede into and thus escape the pressing
actions of these jaws and so be left bulging and unsightly.
To give the edges of the sheet metal the necessary turn or curl, the usual
formation of furrow or groove is made in each of the jaws, while that part of each
jaw which is in contiguity with this furrowed part of its neighbouring jaw is made
to project to fit into and fill up the portion of the furrow it covers, its inwardly
projecting edge being attenuated to die into the surface of its neighbouring jaw
without forming or leaving a ridge at this part by which means the entire contour
of the piece of sheet metal being bent is acted upon as desired.
…גנטינ...ת
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page_text: Improvements in Means or Mechanism for Seaming and Joining
Sheet Metal, the same being especially applicable for Use in
the Manufacture of Boxes, Canisters, or the like.
We, WILLIAM ARTHUR CRABTREE and DAVID CRABTREE both of Wrose
Brow Works, Windhill, Shipley in the County of York, Machine Makers, and
ALBERT SHAW of the same place, Manager, 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, that is to say :-
It relates to improvements in means or mechanism for seaming and forming or
bending and folding sheet metal, the same being especially applicable for use in the
manufacture of boxes, canisters or the like wherein the bottom or top part has to
be secured to the body part by being bent or folded upon or "seamed on
and our
said invention consists in the novel and peculiar formation of jaws or clamping
pieces, arranged to be used in the well known type of squeezing or pressure
machine, whereby the sheet metal parts are bent upon one another to form the
well known double seam or joint with a two fold grip and that in an expeditious
manner and without leaving any part unfolded, bulged or irregular, but so that the
joint thus made will be even throughout its entirety.
In carrying our invention into effect we make use of the mechanism illustrated by
the accompanying sheets of drawings, in which :-
Fig. 1 is an elevation showing front view of the machine.
Fig. 2 is a view of the table or top of the machine with the jaws closed or
pressed together, said figure being drawn to an enlarged scale.
Fig. 3 is a similar view to Fig. 2 but shows the jaws moved apart or open.
Figs. 4 and 5 are drawings in detail, on a further enlarged scale, of parts
hereinafter explained.
Fig. 6 is a perspective drawing in detail of a part to fit the jaws made in
accordance with our invention.
To attain the object of our said invention we make use of the well known kind
of squeezing or pressure exerting machine wherein several jaws or clamps a a' a² a³
are arranged to move in paths converging in a given centre or towards and from
each other in paths at equal distances one from another, the same being operated
by crank mechanism bor pedal mechanism may be substituted for this when
desired as is well understood. However instead of the jaws a al a² as being merely
made to conform to the contour of the box, canister or the like which they have to
operate upon, they are according to our invention so formed to overlap each other,
as by having the additional parts c c c c respectively attached to them or formed
integrally with them, that throughout the entire paths of their respective move-
ments, each jaw, is kept in sliding contact with its neighbour jaw, thus a
perfect
and complete joint is at all times maintained between one jaw and the other by
which there is no open space left for any part of the sheet metal being acted upon
to recede into and thus escape the pressing actions of these jaws so as to be left
bulging, unsightly or unseamed.
To give the edges d of the sheet metal the necessary turn or curl, the usual
formation of furrow or groove e is made in each of the added jaws c c c c; while
that part (f) of each said jaw c c c c which is in contiguity with this furrow e in
its neighbouring jaw, is made to project (see Fig. 6) so as to fit into and fill up
the position of the furrow in which it is situated and covers, its inwardly pro-
jecting edge g being attenuated to die into the surface of its neighbouring jaw
without forming or leaving a ridge at this part or juncture by which means the

page_text: entire contour of the pieces of sheet metal being bent or treated is acted upon as
desired.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a machine of the class described, jaws constructed and arranged to operate in
conjunction with each other substantially as herein specified.
2. In a machine of the class described, pressing jaws formed and arranged in
combination so as to keep or remain in sliding contact with each other throughout
their respective paths of motion substantially as herein set forth.
Dated this 2nd dow of T 1806
WILLIAM A. CRABTREE,
DAVID CRABTREE,
ALBERT SHAW,
Per Samuel Hey,
Agent.
WILLIAM A. CRABTREE,
DAVID CRABTREE,
ALBERT SHAW;
Per Samuel Hey,
Agent.