An Improvement for Perforating Printed (or Unprinted) Sheets of Paper during the Operation of Printing, Applicable to Letter- press Cylinder Printing Machines, known particularly as "Wharfedale" Printing Machines, with Flyers.
Year: 1892

page_text: Date of Application, 27th Apr., 1892-Accepted, 23rd July, 1892
COMPLETE SPECIFICATION.
An Improvement for Perforating Printed (or Unprinted) Sheets of
Paper during the Operation of Printing, Applicable to Letter-
press Cylinder Printing Machines, known particularly as
"Wharfedale" Printing Machines, with Flyers.
I, JAMES NORCROSS PARKINSON, of 20, Sackville Street, in the City of
Manchester, Letterpress Printer, 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 relates to an improvement for perforating paper during the
operation of printing and delivery of the sheets, or for perforating paper without
the sheets being printed, as the case may be, enabling as large a sheet to be
perforated (one way only at one time) as a machine can print or a smaller
sheet as may be desired.
This is effected by means of a cutting-wheel, made in various sizes to suit the
various sizes of "Wharfedale" printing machines made. The combined wheel is
composed of four parts, viz. :-the cutting-wheel A A, having sharpened teeth or
cutting projections on the outside edge (made of thin steel, and being in two equal
parts for convenience in fixing), and two brass couplings B & C (to secure & fasten
the wheel squarely on a shaft D to which the said combined wheel is affixed).
The said brass couplings B C screw upon each other on each side of the said steel
cutting-wheel A, the four pieces thus combined forming practically one whole
wheel E. The teeth on the said cutting-wheel impart the necessary minute cuts or
perforations to the paper, to enable the printed or unprinted sheet to be easily torn
apart at the desired place.
When the combined wheel E is not in use, the brass couplings B C are
unscrewed and the steel cutting-wheel (in two equal parts) A, taken away without
removing the couplings from the shaft, allowing the machine to print as usual,
without perforating the sheets.
To place the wheel E upon the shaft D in the first instance, the said shaft
will be taken off the machine, and the said combined wheel slipped upon it, the
wheel being pierced to the diameter of the shaft to allow the same to pass
through.
In the machine known as the "Wharfedale” printing machine, with flyers,
the said shaft D is already in existence, and revolves at the proper moment for
my purpose. To this shaft the said cutting-wheel E is affixed by means of a
small screw F penetrating one side of the said brass couplings, B, and making
contact with the said shaft D, effectually fastens the combined wheel E thereon in
any desired part thereof.
The said shaft (taking for my description the above-mentioned "Wharfedale"
printing machine, with flyers), is placed and revolves immediately above a wooden
cylinder, which in turn is placed and revolves immediately above an iron cylinder.
This said iron cylinder takes the sheet from the operator and imparts the printed
impression, then delivering the sheet to the wooden cylinder above, which in
turn passes the sheet under the shaft D to the flyers, at which time (the shaft D
at that moment being in motion) the cutting-wheel, A, attached to the shaft D,
presses upon the sheet as it is being carried forward to the flyers (the sheet lying
upon the wooden cylinder) and gives the sheet the necessary cuts or perforations.
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 :-
1.-That I reduce the cost of producing printed and perforated forms.

page_text: 2. That my invention enables said printed and perforated forms to be done at
one operation, which are now done by two separate and distinct printing and
perforating machines respectively.
3. That I save time, labour, and machinery.
Dated this 27th day of April 1892.