Improvements relating to the Pitching or Cementing of Bundles of Bristles or other Fibres in the Manufacture of Brooms and Brushes.
Year: 1893

page_text: Date of Application, 12th May, 1893-Accepted, 17th June, 1893
COMPLETE SPECIFICATION.
Improvements relating to the Pitching or Cementing of Bundles
of Bristles or other Fibres in the Manufacture of Brooms and
Brushes.
I, JOHANNES SANDER of 34 Rödingsmarkt, Hamburg, in the Empire of
Germany Merchant 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 :-
Heretofore in providing the end of a bundle of bristles or fibres with pitch or
other such cement for the purpose of securing such bristles or fibres solidly and
securely together before they are put in the hole in the wooden or other brush or
broom back intended to receive them, it has been found impracticable to first tie
the bundle at the end and then immerse it in the melted pitch or equivalent cement,
since the latter can only coat the surface and ends of the outer lying fibres and ends
only the inner lying fibres and cannot penetrate between the fibres as is necessary
to prevent the inner lying fibres from being pulled out easily when any strain comes
upon them.
It has thus been usual to spread out the fibres which are to constitute the bundle
into as thin a layer as possible holding them thus and immersing their ends in the
pitch previous to rolling them together into a cylindrical bundle and tying them
and again immersing the end of the bundle in the pitch. This operation requires
however certain skill and employment of time and is correspondingly expensive.
The purpose of the present invention is to provide a method by which the pitch
or cement need not be applied until after the fibres are tied in bundles and yet may
be caused to properly and sufficiently pass between the fibres so as secure all the
fibres of the bundle sufficiently strongly and solidly together.
Reference being made to the annexed drawings,
Fig. 1 is a bundle of fibres a tied with a string or the like m.
Fig. 2 shows the same after simply dipping into the pitch.
Fig. 3 is a section of the improved pitching vessel used in this invention, Fig. 4
is a plan of part thereof.
Fig. 5 illustrates the method of pitching hereinafter described and
Fig. 6 in section the bundle after such treatment.
In the pitching vessel is a pin or pins projecting upward though not above the
level of the pitch since the latter would then become solid on the projecting parts
of the pins. These pins i are of suitable cross section and are arranged either
singly or in groups but in such a way that when a bundle previously tied is pressed
down upon the pins or pin so that they or it enters between the ends of the fibres
as shown in Fig. 5 the fibres are separated by the pins or pin and the pitch enters
between them. It may be desirable to repeat the action of pressing the bundle on
the pin or pins and to do this several times, more or less according to the size of the
bundle and number of pins, the bundle being slightly shifted each time so that
the pins or pin enters a different place, and the entry of the pitch is sufficiently
distributed.
This method provides for the insertion of the pitch with economy and despatch.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1) The improvement relating to the pitching or cementing of bundles of bristles
or other fibres consisting in immersing the ends of previously bundled bristles or
other fibres in the pitch or cementing material so that pointed pins enter between
1 Prien 1

page_text: the bristles or fibres and allow of the introduction of the pitch or cementing material
between the bristles or fibres.
2) The improvement consisting in providing in the bottom or otherwise within a
pitching or cementing vessel under the level of pitch or cement therein, a pin or
pins substantially in the manner and for the purpose specified.
Dated this 19th 1^-^ M... 1000
R. HADDAN,
Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, Agent for Applicant.