Improvements in Apparatus for Sharpening Band Knives Employed in Machines for Cutting Cloth and other Materials.
Year: 1893

page_text: Date of Application, 10th July, 1893
Complete Specification Left, 6th Apr., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Sharpening Band Knives Employed
in Machines for Cutting Cloth and other Materials.
We, HENRY WEIGHT, of the Firm of William Wood, of 38 Little Lever Street,
Manchester, in the County of Lancaster, Cap Manufacturer, and WALLACE
ELLIOTT, of 23 Port Street, Manchester aforesaid, Engineer, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to band knife machines for cutting cloth and other
materials and the object of our invention is to sharpen the band knives by an
apparatus permanently or otherwise attached to the machine frame and preferably
arranged so that the band knife can be sharpened whilst the machine is engaged in
cutting cloth or other material; for some purposes as for instance when cutting
many thicknesses of woollen cloth in which cotton yarn is mixed this is found to be
of great assistance.
We propose to fit the apparatus which consists of an adjustable bracket or
brackets carrying an emery disc or its equivalent in a bracket at the end of a
spindle on which, is a coiled or other spring, near the emery disc is a small roller or
other guide the surface of which is parallel to the band knife.
The band knife passes normally freely between the roller or other guide and the
emery disc the periphery of which is at an angle or otherwise to the guide, and in
order to set the sharpening apparatus to work a small lever on or near the spindle
of the disc is turned whereby the spring is released and its pressure is exerted to
move and hold the disc in contact with the band knife, which gives motion to the
disc by friction, and the disc grinds a bevel cutting edge on the band knife which
is resting meanwhile on the roller or other guide. This operation of griuding can
be carried on while the machine is engaged cutting cloth etc.
After the band knife has been sharpened the lever is moved in the opposite
direction so as to withdraw the spindle and the emery disc until the knife requires
to be re-sharpened.
Dated this 7th day of July 1893.
H. B. BARLOW & GILLETT,
Agents for Applicants.
COMPLETE SPECIFICATION..
Improvements in Apparatus for Sharpening Band Knives Employed
in Machines for Cutting Cloth and other Materials.
We, HENRY WEIGHT, of the firm of William Wood, of 38 Little Lever Street,
Manchester, in the County of Lancaster, Cap Manufacturer, and WALLACE
ELLIOTT, of 23 Port Street, Manchester aforesaid, 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 :-
Our invention relates to band knife machines for cutting cloth and other
materials and the object of our invention is to sharpen the band knives by an
apparatus permanently or otherwise attached to the machine frame and preferably
arranged so that the band knife can be sharpened whilst the machine is engaged
Price 8d.]

page_text: cutting cloth or other material; for some purposes as for instance when cutting
many thicknesses of woollen cloth in which cotton yarn is mixed this is found to be
of great assistance.
We propose to fit the apparatus which consists of an adjustable bracket or
brackets carrying an emery disc or its equivalent in a bracket at the end of a spindle
on which is a coiled or other spring; near the emery disc is a small roller or other
guide the surface of which is parallel to the band knife.
The band knife passes normally freely between the roller or other guide and the
emery disc the periphery of which is at an angle or otherwise to the guide, and in
order to set the sharpening apparatus to work a small lever on or near the spindle
of the disc is turned whereby the spring is released and its pressure is exerted to
move and hold the disc in contact with the baud knife, which gives motion to the
dise by friction, and the disc grinds a bevel cutting edge on the band knife which
is resting meanwhile on the roller or other guide. This operation of grinding can
be carried on while the machine is engaged cutting cloth etc.
After the band knife has been sharpened the lever is moved in the opposite
direction so as to withdraw the spindle and the emery, disc until the knife
requires to be re-sharpened.
And in order that our invention may be fully understood and readily carried
into effect we will describe the accompanying sheet of drawings reference being
had to the figures and letters marked thereon.
Fig. 1 is a plan of our improved apparatus for sharpening band knives and Fig. 2
a sectional end view showing the chief parts in a different position.
-
In these views, a is a bracket which may be secured to any convenient part
of the band machine frame; in this bracket is mounted a spindle to the lower end
of which is secured a light frame c through the arms of which are passed two
screwed studs d d'; an emery disc or grinding roller e is supported by these screwed
studs and its position can be changed by adjusting them. To the upper end of the
spindle b is pivoted a cam or locking piece f and a coiled spring 9 wound upon
the spindle is confined between one part of the bracket a, and a pin h which passes
through the spindle. A stud i is secured in the frame.c and passes through holes
in the bracket a to form a guide for the frame c. The bracket a carries a stud j
upon which is mounted a flanged bowl or roller k the periphery of which (to
whatever part of the band cutting machine the bracket a is secured) lies in the
path of the band knife and supports it whilst grinding.
To confine and steady the band knife whilst being ground and sharpened we
employ a finger m secured to or formed with the bracket a.
Fig. 1 represents the emery disc e set at an angle but with its periphery in
contact with the cutting edge of the band knife and when in this position the
motion of the band knife acting upon the emery disc causes it to rotate but the
surface speeds of the band knife and disc being different, because of the angle
between the plane in which the disc revolves and the plane in which the knife
travels, the disc grinds the band knife 7 and keeps its edge sharp.
To take the emery disc e out of action it is only necessary to turn the cam
piece in the direction of the arrow, Fig. 1, thereby drawing up the spindle b
and frame c with the emery disc e, and a reverse movement of the cam piece f
releases the spring g which brings the emery disc again into action to sharpen
the knife. The pressure between the disc and the knife can be varied by
compressing the spring more or less between the bracket a and pin i.
To adjust the position of the emery disc relatively to the band knife / we slacken
a locknut on the stud d and screw the stud outward and then follow this up by
tightening the stud d', or vice versa, by which adjustment the knife edge can always
be sharpened and the emery disc utilized over the greater part of its periphery.
The band knife sharpening apparatus can be attached to any convenient part of
the frame of the cutting machine; for example to the bracket which carries the usual
guides for the knife l above the table of the machine, or it may be attached to the
frame at the back of the machine; and in whatever position it is secured the

page_text: apparatus need not interfere with the free use of the machine either when the emery
disc is in action sharpening the band knife or when the disc is drawn back clear of
the knife.
Having now particularly described and ascertained the nature of our said inven--
tion and in what manner the same is to be performed we declare that what we-
claim is :-
1. In a band knife cutting machine, the arrangement, use and application of an
emery disc or grinding roller mounted in a movable bracket and set at an angle to
the band knife by which it is driven by frictional contact when sharpening the same
substantially as herein set forth.
2. In a band knife sharpening apparatus, the combination with a band knife.
and supporting roller k, of the finger m for confining and steadying the band.
knife whilst being ground substantially as herein set forth.
3. The general construction, arrangement and combination of parts embodying
our improvements in apparatus for sharpening band knives substantially in the
manner and for the purposes herein described and as illustrated by the
accompanying drawings.
Dated this 5th day of April 1894.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicants.