Year: 1887

page_text: Date of Application, 14th Apr., 1887
Complete Left, 13th Feb., 1888
Complete Accepted, 16th Mar., 1888
I, WILLIAM BERTRAM of St. Katherine's Works, Sciennes, Edinburgh, in the County
of Midlothian, North Britain, Engineer do hereby declare the nature of this invention
to be as follows
This Invention relates to an improved process or treatinent for drying paper whether
Tub-sized, Animal sized, or otherwise sized, or not sized.
The essential feature of the Invention consists in the causing of dry air either hot
or cold to act upon the moist paper, as when in the dry state the air readily absorbs
the moisture held in the paper whether in the form of a web or in sheets.
It is obvious that this process is not necessarily limited to the employment of any
particular kind or arrangement of mechanism as any mechanism which enables the air
to act upon the paper either in webs or sheets may be adopted.
J. H. JOHNSON, DAY & JOHNSON,
115, St. Vincent Street, Glasgow,
Petitioner's Agents.

page_text: I, WILLIAM BERTRAM of St. Katherine's Works, Sciennes, Edinburgh, in the County
of Midlothian, North Britain, Engineer 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 relates to an improved process or treatment for drying paper, and it
applies to paper generally, that is to say, to paper which is "tub-sized," "animal sized,"
or otherwise sized, or not sized.
The essential feature of my Invention consists in the causing of dried air, that is to
say,
air which has been deprived of moisture and either heated or at the natural tem-
perature or at a reduced temperature to act upon the moist paper whether in a paper
drying machine in which the web of paper is either moving or stationary, or in a
chamber in which the paper is exposed to the action of dried air in sheets.
The said dried air may be caused to act upon the paper by being blown by a pump
or fanner, or by being drawn by means of an exhauster or other suitable mechanical
contrivance upon or against the paper, either in the form of webs or sheets, and the
effect of causing such dried air to act upon the moist paper is, that the tendency of
dry air to hold moisture in suspension, readily absorbs moisture from the said paper.
The foregoing is the process or treatment which constitutes my present Invention,
and I desire to observe that the carrying out of this process or treatment is not limited
to the employment of any particular kind or arrangement of mechanism, as any
mechanism which would enable the dried air to act upon the paper either in the web
or sheets may be adopted for the working of my process or treatment, and any of the
well known means for drying air may also be used. I desire to observe however
that the apparatus or mechanism described in my specification No. 5425 A.D. 1887,
and of even date herewith is an arrangement of apparatus or mechanism, which
believe to be efficient and the best at present known to me for the working of the
process or treatment of drying paper constituting my Invention by causing the
absorption of moisture therefrom, through dry air acting upon the said paper.
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
claim is
Drying paper whether "tub-sized," "animal-sized " or otherwise sized, or not sized,
by causing dried air to act thereon and absorb moisture therefrom substantially as
hereinbefore described.
ST. JOHN V. DAY,
115, St. Vincent Street, Glasgow,
Applicant's Agent.