AN IMPROVED MACHINE FOR COATING PILLS
Year: 1884

page_text: I, JOHN WILLIAM PINDAR of 75 New Cliurch Road Camberwell in the County
of Surrey, Engineor do hereby declare the nature of my Invention for "AN
IMPROVED MACHINE FOR COATING PILLS" to be as follows:-
The object of this Invention is to ensure the perfect rotation of each individual
pill independant of the rotation of the pan or receptacle in which they are held
during the process of coating, thus causing them to take up an equal thickness of
the substance used for coating at the same time preserving their original globular
or spherical form,
This object I effect by pivotting the pan eccentrically on a revolving, balanced
plate or disc, driven by suitable gearing from a main driving shaft.
Into the base of the pan is firmly screwed or otherwise secured a rod which is
jointed to a second rod pivotted to a fixed standard on the main frame of the
machine.
On rotary motion being communicated to the balanced plate or disc, the pan
containing the pills to be coated will describe a circle around the axis of the
balanced plate, but will not rotate on its own axis by reason of the rods above
inontioned maintaining it in the same relative position with respect to its own axis
at any portion of the revolution of the balanced plate.
This ensures the perfect individual rotation of the pills in the pan independant
of the rotary motion communicated to the pan.

page_text: I, JOHN WILLIAM PINDAR of 75 New Church Road Camberwell in the County
of Surrey, Engineer, do hereby declare the nature of my Invention for "AN
IMPROVED MACHINE FOR COATING PILLS" and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
The object of this Invention is to ensure the perfect rotation of each individual
pill, independent of the rotation of the pan or receptacle in which they are held
during the process of coating, thus causing them to take up an equal thickness of
the substance used for coating, and at the same time preserving their original
globular or spherical form..
This is effected by pivotting the pan or receptacle eccentrically on a horizontal
plate or disc, to which rotary motion is communicated.
The pan is prevented from turning on its own axis by jointed rods in the manner
shewn in the accompanying Drawing: where Fig. 1 is a side elevation and Fig. 2
a plan view of "An Improved Machine for Coating Pills" constructed according to 1
my Invention.
To the base plate A is firmly secured a vertical pivot pin B, which supports a
balanced plate C. A sleeve D bolted to the plate C surrounds the pivot pin B, and
carries a bevil wheel E to which rotary motion is communicated through the bevil
wheel F, shaft G and hand wheel H.
On the plate C (which is balanced by the weight c) is pivotted the pan or
receptacle I for holding the pills to be coated.
Into the base I of this pan is screwed or otherwise secured a rod i which is
jointed to a second rod i pivotted at its rear end to a fixed standard a on the base
plate of the machine.
On turning the hand wheel H, the plate or disc C together with the pan I will
rotate in the direction shewn by the arrow in Fig. 2, but the pan I will not rotate
on its own axis by reason of the rods i i¹ only permitting of a slight axial motion
duo to the vibratory movement of the rod as shewn by the dotted lines 'in
Fig. 2, where the balanced plate C and pan I are shewn in two extreme positions.
This movement will cause the pills to be coated to roll about in the pan I, each
with a separate movement of its own.
This ensures a uniform thickness of coating material being laid on each
individual pill, at the same time preserving their original globular or spherical
form.
The above result is obtained irrespective of the quantity of pills operated upon,
and in a much shorter time than has heretofore been the case for a given quantity
in machines as at present in use.
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
First. In a pill coating machine a pan I mounted on a rotating plate C and itself
held from turing by linkwork, the parts being constructed in the manner

page_text: Second. In a pill coating machine the rotating sleeve D with balanced plate O
for imparting motion to an eccentrically fixed pan I which is itself held from
turning by linkwork in the manner and for the purpose hereinbefore described.
Dated this 14th day of July 1884,
JOHN WILLIAM PINDAR