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Патент USA US2115724

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May 3, 1938.- '
C. D. KNOWLTON I ,
CREASING MECHANISM FOR BLANK MAKING MACHINES
Filed Aug. 27, 1936
2,115,724
2 Sheets-‘Sheet 1_
May 3, 1933- I
_
c. D. KNOWLTO‘N
2,115,724
CREASING MECHANISM FOR BLANK MAKING MACHINES
’
Filed Aug‘. 27, 1936 I
2 sheets-sheet 2
Patented May 3, 1938
2,115,724
UNITED STATES» PATENT OFFICE
2,115,724
CREASING MECHANISM FOR BLANK
MAKING MACHINES
Cutler D. Knowlton, Beverly, Mass., assignor to
Hoague-Sprague Corporation, Lynn, Mass, a
corporation of Massachusetts
Application August 27, 1936, Serial No. 98,109
19‘ Claims. (01. 93-58)
This invention relates to machines by which
are made blanks intended for the formation of
such articles as boxes, it concerning especially
mechanism by which the blanks are creased to
5. facilitate their folding.
, In carrying out the continuous-production
method of making box-blanks from web-material,
it is customary to crease the material both trans
versely of the web and longitudinally to provide
- for the folding of the box-walls at the ends and
sides. In Letters Patent oi the United States No.
2,035,553, Knowlton, March 31, 1936, is described
and claimed a mechanism especially designed for
transverse creasing, and in which power is posi
_ tively applied to web-engaging members to pro
duce a pinch-crease without depending upon the
resistance o?'ered by the material to obtain the
‘creasing action.
2O;
The present invention has. as an
object the application of this power-creasing
effect to the formation of the longitudinal creases,
‘ together with the provision of a capacity, for ad
justment as to the time and force of the pinch.
To this end, I mount upon elongated supports or
carrier-bars, movable longitudinally and toward
and from opposite sides of an advancing web of
blank-material, an inner creasing member or
blade and outer members or blades co-operating
with the opposite sides of the inner member, the
outer members being provided with a movable
actuating member by which they are moved upon
indicated, this invention is particularly directed
to the formation of longitudinal creasesin Web
material, it is to be understood that, as to certain
phases, it is equally applicable to transverse
creasing and also to operating upon discrete 5
blanks.
‘
.
In the accompanying drawings, illustrating one
form of the invention,‘
-
Fig. 1 shows my improved creasing mechanism
in broken side elevation as a part of a blank 10
making machine;
.
Fig. 2 is a partial vertical transverse section,
and
"
'
.
Fig. 3, ,a partial, top'plan view of one end of
thelower carrier-bar and the elements mounted 15
upon it.
7
.
.
‘
A blank-making machine in which this inven
tion may be included is made the subject of
Letters Patent of the United States No. 1,988,451,
KnQWltonLJanuary 22, 1935. In opposite,ex- 20
tended side-frames I0, I!) of this apparatus pairs
of upper and lower shafts I2, I2 and l4, l4, re-_
spectively, are journaled upon, opposite sides of
thetpath of a continuously traveling composite
web W of blank-material which is being operated
upon.
The shafts are rotated in opposite direc
tions by gearing G, the material traveling from
right to left>,_as viewed in Fig. 1. Each shaft
has two crank-portions l6 and I8 spaced across
their support. This actuating member applies
the machine to produce the creasing action along
two parallel lines. The cranks upon the upper
the power which pinches the material between
the inner and outer members to produce the
crease. Means is preferably furnished whereby
and lower shafts at eachside of the machine are
180° apart, so upper and lower supports or
carrier-bars 20 and 22 mounted upon the cranks
there may be varied both the extent of move
ment of the actuating member and the time in
the operating cycle at which it occurs to control
and extending‘ longitudinally of the web are
caused to approach and recede from each other
alternately‘as the shafts’ rotate. This produces
the creasing effect. In the particular embodi
ment of the invention which I’ have chosen to
a crease-section in the web as it is advancing,
and then said web is released and the bars re
40 disclose herein there are primary and secondary
tracted in preparation for the production of the
succeeding crease-section. The cranks for each
bar have the" same angular relation to maintain
.35
actuating members movable upon the support for
the outer blades. One of these actuating mem
bers assumes the form of a sliding bar, while the
other is a lever engaging said bar to move it.
45 The supports are carried by opposite pairs of
rotatable members, preferably furnished by
cranks, and with one of these rotatable members
is movable an element which operates upon the
lever. This element may be variable in position
upon the crank, it thereby altering the‘ movement
of the actuating members to govern the creasing
force.
The lever may have a sectional arm, the
positioning of the section engaged by the crank
element controlling the time at which said force is
55 applied to the material. While, as previously
5
the bars substantially parallelto the web, but
the cranks upon the same shaft are separated
by 90"’, so the creases at the opposite sides of the 45
web will be made at di?erent times.
‘
The creasing instrumentalities at opposite sides
of the machine are similarly arranged, and but
one will be described. The carrier-bar 20 has
adjustably secured upon it in a manner to be de
scribed later, an' elongated mounting-block 24 in
which-is clamped an inner creasing blade 26 be
tween holder-bars 28. The‘carrier-bar 22 has
a similarly adjusted mounting-block 30 which
carries two outer creasing blades: 32, 32 00- 55
2
2,115,724
operating with the opposite sides of the blade 26.
The arrangement of these blades 26 may be sub
stantially the same as that of the corresponding
blades in Patent No. 2,035,553, above referred to.
Brie?y, it may be said that they pivot at their
lower edges upon the block 30, and that their
opposite or upper edges are reduced to effectively
pinch the material. Each blade is backed by a
bar 34 guided for longitudinal movement in the
10
block 36, these bars being preferably joined to
move as a unit.
In the bars and blades are pairs‘
of registering cam-depressions 36, each pair re
ceiving a connecting ball 38. Longitudinal move
ment of the compound bar 34 will, under the in
15 ?uence of inclined walls of the depressions, cause
the blades 32 to be forced toward each other
against the expansive force of interposed separat
ing springs 40 and pinch the material against
member 53 passes the piece 54, releasing the
lever, which will be returned to its normal posi
tion against the nut 4'! by the force of the bar
springs 40 or by an auxiliary spring (not illus
trated) acting directly upon the lever. The
creasing instrumentalities will recede from each
other, and when the advancing web reaches the
point at which the succeeding crease-section is
to be made, they again come into co-operation.
It may be desired to alter the force applied by 10
the blades 32 in pinching the material and also
to alter the time in the operating cycle at which
the creasing effect is initiated.
The first may
vary with the character of the material operated
upon, and the second will insure freedom from 15
straining the laminae of said material or will
give different degrees of separating action there
the inner blade 26 to form a crease-section. The
bar 34 may be considered as a primary actuating
on. Since the extent of projection of the mem
ber 58 beyond the crank-hub will govern the
throw of the lever L, and consequently the effect 20
member for the outer blades.
of the bars 34 uponthe blades 32, this adjust
’
Turning to‘ the features peculiar to the pres
ent invention, the bar 22 has movable upon it
an actuating member for the blades 32.
This
25 may consist of a bell-crank-lever L fulcrumed
at 42 upon one extremity of the bar. The lever
has an upwardly extending arm 44 contacting
with the connection between the two portions
of the actuating bar 34.
An opening through
30 this arm may receive a screw 46 threaded into
ment gives the desired pressure. The time at
which the member acts upon the lever will de
pend upon the relation of the lever-arm-section
52 to the member 58, as determined by the con 25
nection 56.
Thus, the timing of the pinching
effect may be controlled.
To allow the mechanism to form the creases
in different positions transversely of the web,
the mounting-blocks 24 and 30 are preferably 30
the bar, a nut 41 upon said screw limiting the
outward movement of the lever-arm. An arm
adjustable transversely of their bars 20 and 22,
48 extends downwardly from the fulcrum of the
same for each block. Considering the block 24,
» lever L and then outwardly and has attached to
35 its end by slot-and-screw connections 56 a ter
minal-section 52 which projects horizontally be
neath the hub of the adjacent crank-portion [6.
The forward extremity of the section 52 has
attached to its upper face a piece 54 provided
with downwardly diverging contact-surfaces 56,
56. The lever L constitutes a secondary actuat
ing member for thebars 32, and to it the power
of the machine is transmitted by a contact mem
ber 58 carried by the hub of the crank-arm and
45 movable in the rotation of the crank against the
contact-piece 54. The member 58 has inclined
surfaces 60, 60 corresponding to the surfaces 56,
56 of the piece 54 and for successively engaging
these.
This member 58 is shown as cylindrical
50 and variable in position vertically in a bore in
the crank-hub. It is fixed to project to different
distances from the crank by a screw 62 threaded
through the hub and bearing against a ?attened
surface 64 upon the member. An abutment-screw
55 66 threaded into a passage 68 in the crank backs
the member 58 to prevent its accidental dis
placement.
The action of this longitudinal power-creas
As best shown in
60 Fig. 2, the opposite, forward and respectively
downward and upward travel of the bars 26 and
- ing mechanism is as follows.
22 causes the inner creasing blade 26 to be re
ceived between the outer blades 32. Preferably
just at the time of maximum approach or imme
65 diately thereafter, the contact member 58 in the
rotation of the crank reaches the contact-piece
54 of the lever L, turning said lever about its
fulcrum 42. The lever-arm 44 is thereby urged
against the actuating bar 34, which is shifted
70 along the blades 32, causing the balls 38 and
the walls of the depressions 36 to cam in the
blades.
The web-material is consequently
pinched against the sides of the blade 26 to pro
~ duce a crease equal in length to that of the
75 blades.
Immediately thereafter, the contact
respectively.
The adjusting means may be the
it is held against a surface 10 upon the under
side of its bar 20 between side-walls ‘i2, 12 upon 35
the block by screws 14 passing through openings
near the opposite ends of the bar and each en
gaging either. of two threaded bores 16 in the
block. Each screw is movable along a trans
verse slot 18 in the bar to permit the shifting of 40
the block across the surface 16. By applying the
screws 14 to one or the other of the pairs of bores
16, the extent of movement of the screws in the
limited space available is reduced for the extent
of adjustment sought. To facilitate the move 45
ment of the block and to aid in locking it in
place, screws 80, 80 are threaded through the
walls 12, 12 at each extremity of the block to
bear against the opposite vertical faces.
To
avoid undue outward extension of these screws 50
80, they may be of different lengths and inter
changeable when the connection of the screws
14 in the bores 16 is changed.
Having described my invention, what I claim
as new and desire to secure by Letters Patent 55
of the United States is:
1. In a machine for forming blanks from ad
vancing web-material, elongated supports with
their maximum dimension extending in the direc
tion of web-advance and movable longitudinally 60
of and toward and from said web at opposite sides
thereof, an inner creasing member extending
along one support, outer creasing members mov
able upon the other support for co-operation with
the opposite sides of the inner member, these 65
creasing members extending longitudinally of
their supports, and a movable actuating member
by which the outer creasing members are moved
upon their support.
2. In a machine for forming blanks from ad— 70
vancing web-material, supports movable longitu
dinally of and toward and from the web at oppo
site sides thereof, said supports being elongated
in the direction of movement,laninner creasing
member extending along one support, outer creas~ 75
2,115,724.?
_
3
ing members movable upon the other’ support for movement of said support moving‘ the'actuating
co-operation with the opposite sides of the inner
member, a movable actuating member by which
the outer creasing members are moved upon their
support, and means arranged to vary the extent
of movement of the actuating member.
'
3. In a machine for forming blanks from ad
vancing web-material, supports movable longi
tudinally of and toward and from the’web at op
10 posite sides thereof, said supportsbeing elongated
in the direction of movement, an inner creasing
member extending along one support, outer
creasing members movable upon the other sup
port for co-operation' with the opposite sides of
15 the inner member, a movable‘ actuating member
by which the outer creasing members are moved
upon their support, and means arranged to vary
the time in the operating cycle at which the move
ment of the actuating member occurs.
20
4. In a machine for forming blanks from’ ad- .
vancing web-material, supports movable longi
tudinally of and toward and from the web ‘at
opposite sides thereof, said supports-being elon
gated in the direction of movement, an inner
creasing member extending along one support,
outer creasing members movable upon'the other
support for co-operation with the opposite sides of
the inner member, and an actuating member for
the outer creasing members movable upon the
30 support therewith.
5. In a machine for forming blanks from ad
vancing web-material, elongated supports with
their maximum dimension extending in the direc
tion. of web-advance and movable longitudinally
86 of and toward and from said web at opposite
sides thereof, an inner creasing member extending
along one support, outer creasing members mov
able upon the other support for co-operation with
the opposite sides of the inner member, these
40
creasing members extending longitudinally of
their supports, a primary actuating member for
the outer creasing members movable upon the
support therewith, and a secondary actuating
member movable upon the support in engagement
45 with the primary member.
6. In a machine for forming blanks from ad
vancing web-material, elongated supports with
their maximum dimension extending in the direc
tion of web-advance and movable longitudinally
50 of and toward and from said web at opposite
sides thereof, an inner creasing member extend
ing along one support, outer creasing members
movable upon the other support for co-operation
with the opposite sides of the inner member,
these creasing members extending longitudinally
member.
'
"
‘
~
'
8. Creasing mechanism comprising opposite,
relatively movable supports, an inner creasing
member carried by one support, outer creasing
members movable upon theother support for co
operation with the opposite sides of the inner
member, a primary actuating member for the
outer creasing members movable upon the sup
port therewith, and a secondary actuating mem 1 01
ber movable upon. the‘ support relatively to and
in engagement with‘ the primary member.
9. Creasing mechanism comprising opposite,
relatively movable‘ supports, an inner creasing
member carried by one support, outer creasing
members movable upon the other support for co
operation with the opposite'sides of the inner
member, a primary actuating member for the out
er'creasing members- movable upon the support
therewith, a-secondary actuating member movable 20"
upon the support in engagement with the primary
member, and means-arranged to vary the extent
of movement‘ of the secondary member.
10. Creasing mechanism comprising opposite,
relatively movable supports, an inner creasing 25
member carried by‘ one support, outer creasing
members movable upon the other support for co
operation with the opposite sides of the inner
member, a primary actuating member for‘ the
outer creasing members movable upon the sup-' 30
port therewith, a secondary actuating member
movable upon the support in engagement with the
primary member, and means arranged to vary the
time in the operating cycle at which the move
ment of the secondary actuating member occurs. 35
11. Creasing mechanism comprising opposite,
relatively movable supports, an inner creasing
member carried by one support, outer creasing
members movable upon the other support for co
operation with the opposite sides of the inner 40
member, a primary actuating member for the
outer creasing members movable upon the sup—
port therewith, a secondary actuating member
movable upon the support in engagement with
the primary member, and means for transmitting 45
the power of the machine to the secondary mem
ber to e?'ect its movement upon the support.
12. Creasing mechanism comprising opposite
pairs of rotatable members, opposite supports
carried by the members, an inner creasing mem
ber mounted upon one support, outer creasing
members movable upon the opposite support for
co-operation with opposite sides of the inner
member, an actuating bar for the outer creasing
members movable upon their support, and means 55
of their supports, a primary actuating member
for the outer creasing members movable upon the
support therewith, a secondary actuating member
movable upon the support in engagement with
the primary member, and means for transmitting
including an element mounted upon one of the
the power of the machine to the secondary mem
ber to e?ect its movement.
‘7. In a machine for forming blanks from ad
carried by the members, an inner creasing mem
ber mounted upon one support, outer creasing
members movable upon the opposite support for
rotatable members for movement independently
of the bar for imparting its movement to said bar.
13. Creasing mechanism comprising opposite
pairs of rotatable members, opposite supports
vancing web-material, elongated supports with co-operation with opposite sides of the inner
member, an actuating member for the outer 65
their
maximum dimension extending in the direc
65
tion of web-advance and movable longitudinally creasing members movable upon their support,
of and toward and from said web at opposite sides means including an element carried by one of the
thereof, an inner creasing member extending rotatable members for moving the actuating
member, and means arranged to vary the posi
along one support, outer creasing members mov
able upon the other support for co-operation with tion of said element upon the rotatable member. 70
14. Creasing mechanism comprising opposite,
the opposite sides of the inner member, these
creasing members extending longitudinally of relatively movable supports, creasing blades car
their supports, a movable actuating member by ‘ried by the supports, one of the blades being mov
which the outer creasing members are moved able upon its support, an actuating bar sliding
75 upon their support, and means acting in the upon the support for the movable blade, and an 75
2,115,724
actuating lever fulcrumed upon the support with
the bar and having a portion arranged for en
gagement by an element movable under the power
of the machine and a portion engaging said bar
to move it.
15. Creasing mechanism comprising opposite,
relatively movable supports, creasing blades car
ried by the supports, one of the blades being mov
able upon its support, an actuating bar sliding
10 upon the support for the movable blade, and an
actuating lever fulcrumed upon the support with
the bar and engaging said bar to move it, the
lever being formed in sections adjustable as to
their relative position to thereby vary the time of
15 action of the lever upon the bar.
16. Creasing mechanism comprising opposite,
relatively movable supports, means for producing
such movement, creasing blades carried by the
upon its bar, an actuating member for the mov
able blade sliding upon its bar, an actuating lever
fulcrumed upon the bar with the actuating mem
ber and engaging said member, and means mov
able with one of the cranks for oscillating the
lever.
,
18. Creasing mechanism comprising upper and
lower shafts provided with cranks, spaced bars
mounted upon the cranks, creasing blades car
ried by the bars, one of the blades being movable 10
upon its bar, an actuating member for the mov
able blade sliding upon its bar, an actuating lever
fulcrumed upon the bar with the actuating mem
ber and engaging said member, and a member
variable in position upon one of the cranks and 15
engaging the lever. .
19. Creasing mechanism comprising upper and
lower shafts provided with cranks, spaced bars
supports, one of the blades being movable upon its mounted upon the cranks, creasing blades car
20 support, an actuating bar sliding upon the sup
ried by the bars, one of the blades being movable 20
port for the movable blade, an actuating lever upon its bar, an actuating member for the mov
fulcrumed upon the support with the bar and en
able blade sliding upon its bar, an actuating lever
gaging said bar to move it, and means movable fulcrumed upon the bar with the actuating mem
with such movement-producing means for oscil
ber and engaging said member, the lever having
25 lating the lever.
an arm provided with an adjustable section, and 25
17. Creasing mechanism comprising upper and means movable with one of the cranks for en
lower shafts provided with cranks, spaced bars gagement with said adjustable section.
mounted upon the cranks, creasing blades car
ried by the bars, one of the blades being movable
CUTLER D. KNOWLTON.
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