Improvements in Machines for Lining Covers of Metal Cans.
Year: 1897

page_text: Date of Application, 7th Dec., 1897-Accepted, 20th May, 1898
COMPLETE SPECIFICATION.
Improvements in Machines for Lining Covers of Metal Cans.
I, CHARLES ARTHUR ALLISON, of 52, Chancery Lane, London, in the County
of Middlesex, Patent Agent, do hereby declare the nature of this invention (which
has been communicated to me from abroad by Max Ams, of No. 372, Greenwich
Street, New York City, County and State of New York, United States of America,.
Merchant), 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 a machine for providing the flange of a cover for sheet
metal cans with a lining which insures an air tight seam between can and cover,
when the latter is connected to the can body by the usual lap joint. This lining
consists of an adhesive layer, such as rubber cement, and of a powder, such as
asbestos, which forms a thin film upon the adhesive layer. The machine first
applies the adhesive layer to the cover, then throws on the powder while the layer
is still moist, and finally dries the layer, after which the cover is ready to be
joined to the can body.
In the accompanying drawing:
Fig. 1 is a perspective view of a cover lined by my machine showing the lining
partly removed.
Fig. 2 a side elevation of the machine, with the drying chamber partly broken
away.
Fig. 3 a detail of the cement feeding and applying rolls.
Fig. 4 an end view thereof.
Fig. 5 a vertical cross section of the machine on line 5, 5, Fig. 2.
Fig. 6 a rear elevation partly in section of the machine.
Fig. 7 a vertical section through the powder box on line 7, 7, Fig. 6.
Fig. 8 a plan of the chute d, for conveying the covers to the powder box.
Fig. 9 a detail sectional elevation of the front part of the machine showing the
stops and clamp.
Fig. 10 a sectional front elevation of the machine.
Fig. 11 a section on line 11, 11, Fig. 9.
Fig. 12 a detail of cam a8.
Fig. 13 a detail of cam a¹.
Fig. 14 an elevation similar to Fig. 10, showing the parts in a different position.
Fig. 15 a further partial elevation of the machine, showing the parts in a still
different position.
Fig. 16 a detail of the guides a¹6, for conveying the covers to the clamp.
Fig. 17 a detail of auxiliary lever a 15.
Fig. 18 a section on line 18, 18, Fig. 15.0
Fig. 19 a sectional detail of clamp a³, c.
Fig. 20 a sectional elevation of the drying chamber m.
Fig. 21 a plan thereof, with the cover removed.
Fig. 22 an elevation of a modification of the cementing mechanism, showing
the same adapted for square covers.
Fig. 23 a plan thereof.

page_text: Fig. 24 a plan view of the powder box used in connection therewith, and
Fig. 25 a sectional elevation thereof.
The letter a, represents the frame of the machine, and a', is the power shaft that
transmits motion by belt a², to the collar a³, of the clamp that holds the cover while
the adhesive layer is applied. It also transmits motion by belt a', to the shaft a³,
which operates the stops e, f, g, and the ejectors k, and finally it transmits motion
by belt a, to the shaft a', which operates the dusting wheel ¹.
b, is the hopper mounted on one end of frame a, and from which the blank
covers A, are guided in an upright position by a narrow inclined chute b¹, to a
clamp by which the cover is held and revolved during the application of the liquid
rubber cement or other adhesive coating. This clamp consists of the rotating
collar a³, and of a reciprocating plate c, (Fig. 19) fitted on a collar c¹, which turns
loosely on its stud . The plate c, is moved intermittently towards and away
from collar a³, so as to cause the cover A, to be alternately grasped and revolved
by the clamp during the application of the cement and to be then released, so as
to drop into an inclined chute d, that conveys. it to the powder box.
The reciprocating motion is imparted to plate c, from shaft a³, by a cam a³,
(Figs. 5 and 12) mounted upon the shaft and operating a shifting lever a", that
engages by pin a10, a groove c³, of collar c. The shifting lever a, also serves to
throw an upper stop e, intermittently across the chute b¹, so as to prevent the
advance of the row of blanks A, while the clamp is open (Fig. 14). Motion is
imparted to this stop from the lever a³, by means of a spring-actuated rock
shaft a, (Fig. 9) upon which the stop is mounted, and which carries a tappet a¹²,
engaged by lever a³.
After a blank has cleared the upper stop e, it encounters a second stop f, which
holds it above the clamp, while the latter is closed (Fig. 10) and releases it to
become engaged by the clamp as the latter is opened.
The stop f, is operated from cam 8, by a lever a¹³, having nose a, which
actuates an auxiliary lever 15, (Fig. 17) fulcrumed on pin . The lever us,
engages the stop f, which is influenced by spring f¹, (Fig. 15) so that the 'stop
is alternately thrown in and out by the motion of lever a15.
The blank A, clears the stop f, while the clamp is open and is guided by adjust-
able guards a, (Fig. 16) between the two jaws a³, c, of the clamp and upon a
third stop or support g, which prevents the blank from falling through the clamp,
until the latter closes upon the same. The stop g, is attached directly to lever a¹³,
(Figs. 9 and 15) to be operated by the same. Figure 15, shows the position of
the parts as the stop g, advances to support the blank A, which is liberated by
the withdrawal of stop f.
While the blank is revolved by the clamp, a layer of liquid cement or other
adhesive B, (Fig. 1) is applied to its flange as follows:
Into the fountain h, containing the liquid cement or other adhesive (Figs. 3 and 4)
projects a bearing plate h¹, to which is pivoted at 2, an oscillating frame h³, within
which the train of corrugated feed and distributing rolls h4, ho, ho, and h², is hung
A spring 8, throws the frame h³, forward and consequently causes the distributing
roll h, to apply the paste to blank A, as the latter is held and revolved by the
clamp (Fig. 10). When the clamp opens, the blank thus properly coated drops
into the inclined chute d, to be by it conveyed to a box i, within which the powdered
asbestos or other powdered material C, is applied. Within this box there revolves
a dusting wheel ¹, (Figs. 6 and 7) provided with a number of stirring fingers 2³,
and scoops 3.
The blank A, drops upon a seat of the wheel formed between two rows of the
scoops, and thus the powder stirred up by the fingers 22, is thrown against the
moist adhesive coating, to adhere to the blank. In order to increase the capacity
of the dusting wheel ¹, I prefer to make it of duplex construction (Fig. 6) so
that it has two seats upon which the blanks are alternately guided by means of
a switching tongue j, pivoted within the chute d, at j', (Fig. 8). The tongue j
is operated from shaft a³, by cam a¹, (Fig. 13) mounted upon the shaft and

page_text: engaged by a lever a18, which actuates the switching lever a¹, that shifts the
tongue j, (Fig. 9).
The blank A, remains seated upon the dusting wheel i, for a number of revo-
lutions and is then pushed off said wheel by means of ejectors k, which throw the
blank into a chute 1, to be conveyed to the drying chamber m.
The ejectors k, are suspended from the frame of the machine by hangers k¹,
and are provided with pins, engaged by tappets 20, (Fig. 5) mounted on shaft a³,
so that the desired reciprocating motion is imparted to the ejectors.
Within the drying chamber m, the blanks A, fall with their coated and dusted
side downwards, upon a perforated disk m¹, revolved by chain m², (Figs. 20 and 21).
Above the upper face of this disk are fixed two eccentric guides m³, mt, of which
the guide m³, pushes the blanks towards the periphery of the disk after one
revolution of the same, while the guide m', pushes the blanks off the disk after
the second revolution, to fall into a suitable receptacle.
Beneath the disk m¹, is placed a heating coil m³, which causes the blanks to
be properly dried while laying upon the disk.
It will thus be seen that by my machine the blanks are fed singly to the clamp
and are then grasped and revolved by the latter. During this revolution the
adhesive coating is applied by roller h, after which the clamp opens and the coated
blank rolls down the chute d, on to the dusting wheel, alternate blanks being
by the tongue j, guided to opposite seats of the wheel, so that the capacity of the
latter is doubled. The blanks remain seated upon the wheel until the adhesive
coating has been covered with a thin film of powder, and then the ejectors k, push
the powdered blanks off the wheel and into the chute , to roll upon the revolving
disk m', of the drying chamber.
Here the blanks are subjected to the action of the heating coil m³, during a few
revolutions of the disk, to be finally thrown into a suitable receptacle ready for
use.
In Figures 22-25, the machine is shown to be adapted for lining rectangular
covers. Here the blank A, is supported in an upright position upon the stop g,
described, by means of a pair of upright plates n. The edge of the blank is held
against the faces of a pair of feed rollers o, revolved from shaft o³, by means of
This lever is
a pressure roller o¹, mounted upon a spring-actuated lever o².
fulcrumed upon a second spring-actuated lever 03, engaged by a lever o, which is
operated by one of the cams of the machine. As the wheels o, are revolved, they
rotate the cover and bring its flange into contact with the cement applying
roller 7.
After the cover has been properly coated, the pressure roller o¹, is withdrawn
by the action of lever o, which tilts lever 03, and causes a projection 06, on
lever o, to engage an inclined fixed stop o', so that the roller o¹, is swung away
from rollers o. The blank being thus released, drops upon an endless feed apron p,
which conducts it upon a revoluble perforated plate or screen q, within the powder
chamber i.
The dusting wheel g', has wings q², and revolves beneath the screen 9, so as to
A fixed inclined
throw the powder upon the lower coated flange of the blank.
guide q³, conducts the blank off the screen after a complete revolution of the
latter.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:-
1. A machine for lining covers, composed of means for applying a moist adhesive
coating to the cover, and means for applying a powdered film to the moist coating,
substantially as specified.
2. A machine for lining covers, composed of means for applying a moist adhesive
coating to the cover, means for applying a powdered film to the moist coating
and means for drying the coating, substantially as specified.

page_text: 3. A machine for lining covers, composed of means for revolving the cover, a
fountain for holding an adhesive material, means for conveying the adhesive
material from the fountain to the cover as the latter is revolved, a powder box, a
rotating wheel within the same, and means for conveying the cover to the powder
box, substantially as specified.
4. In a machine for lining covers, the combination of a clamp for holding and
revolving the covers with a fountain for holding an adhesive material, means for
conveying the adhesive material from the fountain to the covers as the latter
are revolved, stops for retarding the motion of the covers as they are fed to the
clamp, and means for operating the stops, substantially as specified.
5. In a machine for lining covers, a dusting roller provided with a series of
fingers for stirring the powder and with a series of scoops for throwing the powder
upon the covers, substantially as specified.
6. In a machine for lining covers, the combination of means for revolving the
cover, with a fountain for holding an adhesive material, means for applying the
adhesive material to the cover as the latter is revolved, a duplex dusting wheel
having two cover seats, means for conveying the cover to the dusting wheel, and
a switching tongue for conveying alternate covers to opposite seats on the wheel,
substantially as specified.
7. In a machine for lining covers, the combination of a clamp for revolving
the cover, with a fountain for holding an adhesive material, means for applying
the adhesive material to the cover as the latter is revolved, a series of stops to
retard the motion of the cover, a powder box, a dusting wheel having a series of
scoops and fingers, and means for conveying the cover to the dusting wheel, sub-
stantially as specified.
8. In a machine for lining covers, the combination of a fountain for holding
an adhesive material with means for applying a moist adhesive coating to the
cover, a powder box, means for applying a powdered film to the moist coating, a
drying chamber, a revolving plate and eccentric guide within the chamber, and
means for feeding the cover from the powder box to the revolving plate, substan-
tially as specified.
9. A machine for lining covers, constructed substantially as herein shown and
described.
Dated this 7th day of December 1897.
ALLISON BROS.,
Agents for the Applicant.