A New or Improved Metallic Foil Coated Airtight and Grease-proof Paper.
Year: 1890

page_text: Date of Application, 22nd May, 1890
Complete Specification Left, 23rd Feb., 1891-Accepted, 22nd May, 1891
PROVISIONAL SPECIFICATION.
A New or Improved Metallic Foil Coated Airtight and Grease-proof
Paper.
I FRANK WILLIAM CROWTHER, of No. 14 Whitechapel Road, London, E.
Wholesale Stationer, do hereby declare the nature of this invention to be as
follows:
My invention has reference to paper which is airtight and grease-proof and
coated with a surface of metallic foil, being intended more especially for use in
packing tea or for analogous purposes.
cr
According to my invention the paper is first rendered impervious in any suitable
manner or it may consist of, or be similar to, the substances known as
<< vegetable
parchment paper," or grease-proof parchment paper." A liquid or other con-
venient coating of tin or other metallic foil is applied to either one or both of the
surfaces which are then rolled and burnished or otherwise finished in a suitable
way.
Dated this 22nd dox of Max 1800
A. F. SPOONER,
Agent for the Applicant.
COMPLETE SPECIFICATION.
A New or Improved Metallic Foil Coated Airtight and Grease-proof
Paper.
I FRANK WILLIAM CROWTHER, of No. 14 Whitechapel Road, London, E.
Wholesale Stationer, 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 :-
My invention has reference to that class of paper intended more especially
for use in packing tea or for other analogous purposes in which a packing
or wrapper impervious to fluids, moisture, grease, and atmospheric influences is
desirable.
The object of my invention is to produce a paper substance, or material which
possesses at the same time all the advantages and qualities of expensive metallic foils
without any of the disadvantages which appertain to the employment of such
metallic foils as packing or wrapping materials. As is well known all metallic foils
are expensive and of great weight, but by the invention hereinafter described
I produce a paper substance, or material which is not only similar in appearance to
metallic foil and possesses all the air, grease, water, damp and climatic proof
qualities of such metallic foils, but also the very considerable advantages of extreme
lightness of weight and cheapness of production.
The essence of my invention consists in the application of a metallic coating
to one or both surfaces of paper which has previously been rendered impervious to
the action of air, water, grease, and kindred influences.
In carrying out my invention I take a sheet of paper such as is known in the
trade as "vegetable parchment paper" or "grease-proof parchment" or other paper
which is impervious to air, water, grease, and kindred influences and to one or both
of the surfaces of such paper I apply a suitable liquid or other convenient coating
of tin or other metal or metals by means of a brush or other suitable means or
machinery. The surfaces so coated with metal are then finished by being burnished
and rolled.

page_text: I am aware that metals have been applied to the surface or surfaces of ordinary
paper prior to the date of my invention and I wish it to be distinctly understood
that I do not claim as my invention the application of a metallic coating to the
surface or surfaces of paper per se.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:
The manufacture of a material or substance possessing all the advantages and
none of the disadvantages of metallic foils and being in addition lighter in weight
and cheaper in cost than such said metallic foils, and consisting essentially of the
combination of grease, air, and waterproof paper with metal applied to the surface
or surfaces of such grease air and waterproof paper in a liquid or other
convenient form by any suitable means substantially as hereinbefore described and
set forth.
Dated this 23rd day of Febru 1901