Improvements in the Manufacture of Tea and Coffee Strainers.
Year: 1890

page_text: Date of Application, 16th Oct., 1890
Complete Specification Left, 15th July, 1891-Accepted, 15th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Tea and Coffee Strainers.
I, WILLIAM VALE, of 220, Summer Lane, Birmingham, Warwickshire, Optician,
do hereby declare the nature of this invention to be as follows:-
This invention has reference to those tea and coffee strainers which consist of a
hemispherical or dome shaped wire gauze strainer mounted in a sheet metal rim
and furnished with a bow and clip or other means for attachment to the spout of a
tea or coffee pot to depend therefrom so that when pouring from the pot any tea
leaves or coffee grounds passing through the spout will be retained in the strainer.
Heretofore it has been customary to fix the wire gauze part to the rim or mount
by soldering which is comparatively expensive and renders it impossible to finish
the article neatly, but by my invention 1 am enabled to dispense with the operation
of soldering, thereby reducing the cost of production and moreover I impart a
better finish to the strainers than heretofore.
In carrying out this invention I raise from sheet metal, by dies worked in a
press, a channel section annular rim or mount. This accomplish by first raising
a rim round a circular blank then piercing out the central part of the blank so as
to leave an internal flange which by a subsequent process is turned up as an
internal annular lip. The edge of the wire gauze dome shaped part is then inserted
in the annular channel in the mount and there retained by closing the channel so
as to grip the wire gauze. This can be done either by rolling, swaging, or by
press tools.
The outer rim is by preference made rather deeper than the internal lip and
shouldered down in closing the channel on to the wire gauze so as to hold on to the
latter more securely.
Dated this 15th day of October 1890.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Tea and Coffee Strainers.
I, WILLIAM VALE, of 220, Summer Lane, Birmingham, Warwickshire, Optician,
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 those tea and coffee strainers which consist of a
hemispherical or dome shaped wire gauze strainer mounted in a sheet metal rim
and furnished with a bow and clip or other means for attachment to the spout of a
tea or coffee pot to depend therefrom so that when pouring from the pot any tea
leaves or coffee grounds passing through the spout will be retained in the strainer.
Heretofore it has been customary to fix the wire gauze part to the rim or mount
by soldering which is comparatively expensive and renders it impossible to finish
the article neatly, but by my invention I am enabled to dispense with the operation
of soldering thereby reducing the cost of production and moreover 1 impart a
better finish to the strainers than heretofore.
On the accompanying drawing-
Fig. 1 is a general view of one of the said tea and coffee strainers to which this
invention refers:

page_text: Fig. 2 shews one of the circular blanks from which I make the rims of the said
strainers, and
Figs. 3, 4 and 5 shew progressive stages in the formation of the said rim from the
blank (Fig. 2) to the finished rim Fig. 6, a part section of which is also shewn on
an enlarged scale by Fig. 7.
In carrying out this invention I raise from sheet metal by means of dies worked
in a press, a channel section annular rim or mount A such as represented in plan
and section by Fig. 5. This accomplish as follows:-I take a circular sheet
metal blank such as shewn by Fig. 2 and I raise a rim a' round the same as shewn
in Fig. 3. I then pierce out the central part of the blank so as to leave an internal
flange a² which by a subsequent process is turned up as an internal annular lip as
seen in Fig. 5. The edge of the wire gauze dome shaped part B is then inserted
in the annular channel in the mount and there retained by closing the channel so
as to grip the wire gauze B (see Figs. 6 and 7). This can be done either by
rolling, swaging or by press tools as will readily be understood.
The outer rim a¹ is by preference made rather deeper than the internal lip a
and shouldered down at as in closing the channel on to the wire gauze so as to hold
on to the latter more securely.
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 :-
Making the annular rim or mount parts of tea and coffee strainers, of the kind
herein referred to, from circular sheet metal blanks and securing the said mounts
and the wire gauze parts together all in the manner substantially as herein before
described and illustrated by the accompanying drawing.
Dated this 14th day of July 1891.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.