A New or Improved Creasing or Creasing and Folding Machine for Envelopes and the like.
Year: 1892

page_text: Date of Application, 5th Apr., 1892-Accepted, 6th Aug., 1892
A New or Improved Creasing or Creasing and Folding Machine for
Envelopes and the like.
I, JOSEPH CORBETT, Mechanical Engineer, of 90 Crosby Street in the City
of New York in the County of New York and State of New York, in the United
States of America, 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 :-
In the creasing machines as well as in the creasing and folding machines
heretofore in use the blank from which the envelope or other article is folded
is first creased by means of a male and female die, or as they are called in this class
of machines by a plunger and box which serve for the purpose of creasing and
bending the flaps at right angles to the body of the blank which flaps are then
folded down on the body by suitable folding devices. For the different sizes of the
envelopes or other articles different sizes of plungers and boxes were required while
for extra sizes of the same special plungers and boxes had to be made for the
purpose of producing the required size. This is often inconvenient and when only
a small quantity of envelopes or other articles of extra size are required connected
with considerable expense and trouble.
The object of my present invention is to furnish an improved plunger and box for
creasing or creasing and folding machines by which the blanks are creased
preparatory to folding and which can be adjusted to any desired size within certain
dimensions so that any required size (within said dimensions) of envelope or other
article can be quickly and conveniently manufactured and thereby the creasing
and folding devices are adapted to the different requirements of the trade.
The invention consists of a creasing device in which the plunger and box are
adjustable in longitudinal as well as in lateral direction the plunger being composed
of an exterior frame the sides of which are formed of two plates which are
adjustable on the side bars of an inner frame by suitable guide devices. The side
bars of the inner frame are provided with fixed longitudinal and transverse
extension rods which are guided in suitable keepers of a central plate or web to
which the plunger rod is attached. The keepers are provided with suitable
fastening devices for rigidly securing said extension rods when they are adjusted.
The box is constructed of stationary parallel rails having guide-ways longitudinal
bars provided with fixed slide pieces that are guided in said ways of said rails
transverse bars guided in keepers of the longitudinal bars and fastening devices for
adjusting the transverse bars on the longitudinal bars according to the size of the
article to be produced.
In the accompanying drawings
Fig. 1 represents a plan partly in borizontal section of my improved plunger and
box for creasing or creasing and folding machines.
Fig. 2 is a vertical longitudinal section on line 2-2 Fig. 1.
Fig. 3 is a vertical transverse section of the same on line 3-3 Fig. 1, and
Fig. 4 is a detail of the outer frame of the plunger showing the adjustable plates
of the same.
Similar letters of reference indicate corresponding parts throughout.
Referring to the drawings P represents the plunger and B the box of my
improved creasing device. The plunger P is composed of a central plate a an
inner frame d and an outer frame F. The central plate a which is made of oblong
shape and the size of which corresponds to the smallest size of the envelope or
other article to be creased by the plunger and box. The central plate a is rigidly

page_text: attached to the plunger rod R which is connected with the operating parts of the
creasing or creasing and folding machines.
To the central plate a are applied keepers by means of screws bb or other
fastening: devices two of said keepers being arranged at each side of the central
plate a. Each keeper serves for guiding two longitudinal or two transverse
extension rods d d which are attached respectively at opposite ends to the side
bars of the inner frame e of the plunger. P.
The longitudinal extension rods d are arranged below the level of the transverse
extension rods d as shown clearly in Figs. 2 and 3 of the drawings. The extension
rods d d' are advantageously made of rectangular cross section the keepers being
shaped to correspond thereto. One set of the longitudinal extension rods is applied
to one side bar of the interior frame e while the second set of the longitudinal
extension rods d is applied to the other side bar of the same. In the same
manner one set of the transverse extension rods d' is rigidly attached to the third
side bar of the interior frame e while the other set to the fourth side bar of
said frame so that on adjusting the side bars of the interior frame e in outward
direction the extension rods d d' readily follow the same and permit thereby the
extension of the plunger to any desired size as far as permitted by the length
of the longitudinal and transverse extension rods d d'.
When the proper adjustment of the extension rods is made they are firmly
secured in position by means of set screws d' or other fastening devices which pass
through the keepers band keep the extension rods in position.
The inner
The side bars of the interior frame e are not connected at the ends but are
provided with headed screws e¹ on the shanks and heads of which the inner and
outer plates f f respectively of the exterior frame F are guided by means of
slots for other suitable guide devices as shown in Figs. 2, 3, and 4.
plates are provided at their lower edge with an outwardly bevelled flange fx
which fits snugly to the lower bevelled edge of the outer plates f¹ as shown clearly
in Figs. 2 and 3.
This arrangement furnishes a creasing edge around the entire outer edge of the
exterior frame F of the plunger P to whatever size the inner and outer plates of
the frame F are adjusted consequently the exterior frame F of the plunger may be
adjusted to as great a size as permitted by the extension rods while still preserving
the edge required for creasing the blank which edge is formed by the lower edges
of the inner or the outer plate at the portions where the plates fand f' do not
overlap while at the overlapping portions both edges together form the creasing
edge.
The box B is constructed of stationary parallel rails B₁ which are provided
with suitable ways in which the slide pieces B² of the longitudinal bars B³ are
guided.
The longitudinal bars B' are firmly secured to the slide pieces by means of screws
or other suitable fastening devices.
On the longitudinal bars B* of the box B are arranged sleeves s which are
provided with transverse slots for the transverse bars B which are arranged
above the longitudinal bars B³ and guided in the slots of the sleeves & as shown
in Fig. 1.
The sleeves s of one longitudinal bar B³ are provided with set screws s¹ in line
with the transverse bars B and the sleeves of the transverse bars B with set
screws in line with the longitudinal bars B³ so as to adjust the longitudinal and
transverse bars B B on each other and then secure the same firmly in position so
that the box B can be adjusted to exactly the same size as the outer edge of the
plunger due allowance being made for the thickness of the material from which the
envelope or other article is made so that the flaps which are bent up from the body
of the blank by the edges of the plunger and the box find sufficient space between
the plunger and the box B.
By means of the adjustment of the longitudinal and transverse bars of the box B
the same can be adjusted to correspond to the different sizes to which the plunged

page_text: is adjusted so that any required size of envelope or other article within certain
limits can be readily produced by the plunger and box as soon as the required
adjustment as to the length and width of the article is set. off in the plunger
and box.
The advantages of my improved plunger and box for creasing or creasing and
folding machines are that on one of said machines any desired size (within
aforesaid limits) of blank can be creased-and bent the smallest being that corre-
sponding, to the central plate or web of the plunger while the largest size
corresponds to the largest length to which the extension rods and bars of the
plunger and box may be extended.
The creasing or creasing and folding machine is thereby enabled to crease and
bend any desired size of blank whether a larger or smaller number has to be
worked without necessitating any extra expense for making special plungers and
boxes for the required size so that thereby the scope of such creasing or creasing
and folding machines is greatly enlarged as one and the same machine can supply
any desired size of article which is a great convenience to manufacturers of
envelopes and similar articles.
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. The combination in a creasing or creasing and folding machine of a box
formed of longitudinal and transverse bars connected at right angles with each
other with a plunger composed of a central plate or web longitudinal and transverse
extension rods guided on said web an interior frame supported on said rods and an
exterior extension frame supported on the interior frame substantially as set forth.
2. The combination in a creasing or creasing and folding machine of a box
formed of stationary guide bars longitudinal bars guided in ways of stationary
bars and transverse bars supported in sleeves of the longitudinal bars with a
plunger composed of a central plate or web longitudinal and transverse extension
rods guided on said web an interior frame supported by said rods and an exterior
extension frame supported on the interior frame substantially as set forth.
3. A plunger for creasing or creasing and folding machines composed of a
central plate or web extension rods guided on said web an interior frame sup-
ported on said web and an extension frame supported by the interior frame
substantially as set forth.
4. A plunger for creasing or creasing and folding machines composed of a central
plate or web longitudinal and transverse extension rods guided on said web an
interior frame supported by extension rods and an exterior extension frame
supported on the interior frame substantially as set forth.
5. A plunger for a creasing or creasing and folding machine composed of a
central plate or web an interior frame provided with extension rods guided on said
plate means for clamping said extension rods to said plate and an exterior frame
the sides of which are formed of two plates which are adjustable on the interior
frame substantially as set forth.
6. A plunger for creasing or creasing and folding machines composed of a central
plate or web provided with keepers an inner frame provided with longitudinal and
transverse extension rods attached to the side bars of the inner frame means for
securing said extension rods to said keepers and an exterior frame formed of inner
and outer plates which are connected to the side bars of the inner frame the inner
plates being provided with inclined bottom flanges which slide along the bevelled
bottom edges of the outer plates substantially as set forth.
7. A box for creasing and creasing and folding machines composed of stationary
parallel bars longitudinal bars guided in ways of the stationary bars and transverse
bars guided in sleeves on the longitudinal bars, substantially as set forth.
8. A box for creasing or creasing and folding machines composed of stationary
parallel bars having guideways longitudinal bars having slide pieces guided in said

page_text: ways sleeves on the longitudinal bars transverse bars guided in the sleeves on the
longitudinal bars and means for clamping the longitudinal bars to the stationary
bars and the transverse bars to the sleeves of the longitudinal bars substantially as
set forth.
Dated this 5th day of April 1892.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.