Improvements in Tuck Creasers or Markers for Sewing Machines.
Year: 1889

page_text: Date of Application, 9th Apr., 1889
Specification Accepted, 18th May, 1889
[Communicated, from abroad by THE SINGER MANUFACTURING COMPANY, of New York,
in the United States of America. Sewing Machine Manufacturers.]
Improvements in Tuck Creasers or Markers for Sewing Machines.
1, ALEXANDER ANDERSON, Manager of The Singer Manufacturing Company's
Works, Kilbowie, Dumbartonshire, do hereby declare the nature of this invention and
in what manner the same is to be performed as communicated to me to be, particularly
described and ascertained in and by the following statement :-
In the operation of that class of tuck creasers in which a notched or grooved
creasing roller or arm is caused to travel back and forth in contact with the work
lying on an upturned creasing lip more or less difficulty has been encountered when
creasing across previously made tucks, plaits or seams owing to the fact that the goods
are moved back and forth with the creasing roller or arm and the proper feed of the
work is thus interfered with.
The object of my invention is to obviate this difficulty by providing an improved
tuck creaser having a rigid creasing arm which is yieldingly pressed against the work
by a spring connecting the same with a rigid rocking har operated from the needle
bar of the machine.
In the accompanying drawings Fig. 1 is a perspective view of my improved tuck
creaser. Fig. 2 is a front view, Fig. is a plan view and Fig. 4 an end view of the
same. Fig. 5 is a vertical section on line 5-5, Fig. 2; and Fig. 6 a section on
line 66 Fig. 2, looking towards the left in both instances.
A denotes a bracket by which the creaser is to be secured in operative position
and B is a supporting bar passing loosely through said bracket but secured therein in
The bar B has a return
any desired position of adjustment by the clamping nut a.
bend or lower part b preferably flattened, as shown and which is provided at its
forward end with an upturned creasing lip C is a rocking bar extending
lengthwise of the creaser parallel with the bar B and pivoted to the latter by means
of the arms c.
D is a rigid creasing arm or lever pivoted on the bar B and having a
notched lower end registering with the creasing lip said arm being yieldingly
connected with the rocking bar by the spring rod d which enters holes in

page_text: the upper end of the lever D and in the rear arme of the said rocking bar,
the latter being provided near its rear end with a forkedulug. c embracing the
said rod.
E is the operating lever pivoted on the bar B and shown in the present instance as
being provided with the hooked link e for connection with the needle bar of a sewing
machine, the said lever being notched at e' to embrace the rocking bar C, to operate
the latter. F is the strip guide having an arm by which it is attached to the
bracket A. The arm passes loosely through said bracket so that the said guide
may be secured in said bracket in any desired position of adjustment by the clamping
nut a.
The operation of my creaser is as follows: When the needle bar is lifted and the
feed is to occur the creasing arm I) is raised as shown in full lines in Fig. 4, and
when the needle bar descends the said arm moves downward until it comes in contact
with the work when it stops; and as the needle bar descends further the said arm is
yieldingly pressed upon the work lying on the creasing lip, the rocking bar C moving
forward somewhat after the arm D has stopped thus pressing the notched lower end
of the said arm firmly, on the work and thereby making a well defined crease therein,
but without rubbing along on the same.
When the Needle bar rises the arm or lever D remains in contact with the work
until the bar C in its backward movement comes in contact with the lug on the
said arm or lever when the latter is lifted from the work. Thus the operation
continues, the creases being formed merely by the pressure of the rigid but yieldingly
pressed creasing arm or lever against the work lying on the creasing lip.
I am aware that a rocking bar having a spring creasing arm has heretofore been
employed in creasing devices, but I believe it to be new with me to employ a rigid
creasing arm yieldingly connected with a rocking bar. In the prior devices to which
I have made reference more or less trouble has been experienced owing to the
displacement of the goods by the spring creasing arms, and 1 obviate this difficulty and
secure more uniformity and reliability of action than was possible with the similar
devices heretofore employed.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
ne declare that what I claim is :-
1. In a tuck creaser or marker the combination with a rigid rocking bar, and means
for supporting and operating the saine, of a rigid creasing arm having a yielding
connection with said rocking bar, and a lower creasing lip or device co-operating with
said creasing arm.
2. In a tuck creaser or marker, the combination with the supporting bar B having
a return bend provided at its forward end with a creasing lip, of the rocking bar C
pivoted on said bar B, the rigid arm or lever D, the spring rod d connecting said
rocking bar with the said arm or lever, and the operating lever E.
Dated this Eighth day of April 1889.