Improvements connected with Stamping or Plunger Presses for the Manufacture of Saucepans and like Culinary Articles.
Year: 1898

page_text: Date of Application, 27th May, 1898-Accepted, 13th Aug., 1898
COMPLETE SPECIFICATION.
Improvements connected with Stamping or Plunger Presses for the
Manufacture of Saucepans and like Culinary Articles.
We, JAMES WATT PERKINS and RICHARD WOODHOUSE PERKINS, of the Firm
B. Perkins and Son Ld., 133, Bermondsey Street, Southwark, London, Tin Ware
Manufacturers, 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 for object, the stamping of shaped articles such as sauce-
pans, stewpans stackpots and like culinary vessels from thick sheet metal by
dies of particular shapes to which the sheet has to conform by a series of blows
from a falling ram head operated by wiper cams to lift it only while the plate is
held within die beds with a gentle inward drawing from the edges which are
otherwise held firmly in a recess in the upper face of the die bed by pressure
plates capable of being released by side levers in connection with treadle bar
which allows of the plate moving without the formation of wrinkles or creases
during the gathering in and stamping process. Articles thus made may have
slightly tapered sides or nearly parallel sides and after the raw edges are dressed
by grinding or otherwise the handles can be rivetted on ready for use.
The articles say of thick sheet steel or of iron or of copper, aluminium or other
metal may be tinned or enamelled as desired.
The annexed drawings will indicate how we carry our invention into practice.
Figure 1, front elevation partly in section of an apparatus in which tapered
sided articles can be produced the press head being lifted by wiper cams from
each side of the vertical stem and driven by a shaft centrally fitted for rotation
in a slot of the same stem for central lift and direct down thrust of the falling head.
Figure 2 similar view at right angles to that shown at Figure 1.
Figure 3 front elevation of a repeat of the operable appliances but with the bed
die and pressure block adapted for substantially parallel sided articles which may
be produced direct or as a second operation from the tapered sided articles.
A die bed having the desired shape of opening to suit the shape of the article
to be stamp moulded. B recess in upper surface for reception of sheet B¹ to be
stamped.
C bearer plate to bear on said sheet to keep it from jumping during the stamp-
ing, yet permitting it to be drawn inwardly as the stamping progresses. This
plate C is gimballed on studs D, D, of side bars E, E, which by connection to the
treadle F pivoted at G permits of the necessary foot pressure being applied, the
weight H on the back end of the leyers I I releasing the pressure on removal of
the attendants foot. J is the press head or force secured to the lower end of the
vertical stem or ram K which for the purpose of this invention is slotted at L
for the passage of the wiper cam shaft M on which the wiper cams N, N, are
carried these having a rotative action to lift the ram K and pattern die or stamp
head or force J by rubbing under the rollers P, P, which are supported on stud
pins Q, Q, projecting from the ram, and then as the wiper cams pass the contact
[Price 8d.1