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Патент USA US2106271

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Jan. 25, 1938.
I
R, M_ DALLAS
q
2,106,271
STAY PLAITING MECHANISM FOR BLANK MAKING MACHINES
Filed July 22, 1956
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STAY PLAITING MECHANISM FOR BLANK MAKING MACHINES .
Filed. July 22, 1936
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2,106,271v
Patented Jan. 25, 1938
PAT
UNH'ED
OFFICE
2,106,271
STAY-PLAITING MECHANISM FOR BLANK
MA'KING MACHINES
Robert M. Dallas, Beverly, Mass, assignor to
Hoag'ue-Sprague Corporation, Lynn, Mass., a
corporation of Massachusetts
Application July 22, 1936, Serial No. 91,883
11 Claims. (CI. 93-36)
My invention relates to machines by which
are produced box-blanks from combined webs in
cluding shell-material, furnishing the body of the
blank, and thinner stay-material, by which the
5 longitudinal edges of the shell are reinforced. It
especially concerns the mechanism by which
stay-material adhering in loops to the edges of
the shell-web provided with notches may be de
pressed into these notches in the form of double
folds or plaits.
In Letters Patent of the United States No.
1,988,451, Knowlton, January 22, 1935, is dis
closed a blank-making machine in which mecha
nism of this character is included. Here, the
15 traveling webs are presented to a depressing and
plaiting disk by a pair of rolls which are de
pended upon to hold the work in the correct po
sition to receive the action of the disk, from which
they are necessarily somewhat spaced along the
2 O path of the webs. It is an object of my inven
tion to insure a more symmetrical folding of the
25
30
3
4O
45
5O
means in a plane corresponding to that of the
work. To provide for the proper action of the
disk or other depressing means as the width of
the blankis changed, the normal position of the
disk toward and from the loop upon which it is
to act is varied. In the particular organization
herein disclosed, a lever is fulcrumed adjacent
to the path of the combined webs and is actuated
by a cam upon one of the rolls of the associated
operating mechanism. The plaiting disk may ro
tate in a holder which is variable in position upon
a carrier in a direction intersecting the plane of
the web, the carrier, in turn, being arranged for
adjustment upon the lever in a direction toward
and from the web. Moreover, the cam is pref
erably adjustable to cause it to act in correct
time-relation upon notches differently spaced in
the material.
.
v
In the accompanying drawings, a particular
20
embodiment of my invention is illustrated,
Fig. 1 being a broken top plan view of my im
proved crimping mechanism, the upper roll being
stay-material within the notches in the shell
material than can invariably be obtained with omitted;
Fig. 2, a transverse section on‘ the line II--lI
an organization of the character just mentioned.
of Fig. 1; ‘
In the attainment of this object there is em
Fig. 3, an enlarged broken elevation of the
ployed a rotatable member, which not only de
crimping and guiding member and its mounting,
presses the thinner material into the shell
notches but also guides it for such depression. and 1
Fig. 4, a perspective view of a portion of the
The combined plaiting and guiding member pref
erably comprises a plaiting disk, which may have Work which has been operated upon.
At l0 appears a portion of the frame of a ma
a V-shaped periphery and contact with the edge
of the loop of stay, and a disk at each side of the chine for producing blanks for box-parts, such,
plaiting disk which guides and centralizes the for example, as the apparatus of the previously
webs to receive the action of the plaiting disk. mentioned patent. This frame includes a hous
Inwardly converging Walls upon the guide-disks ing, in which is rotatable in bearings II a pair
may direct the webs to the plaiting position. of rolls l2, [2 operating upon and advancing the
work. Rolls of different diameters may be
Since the locating effect is exercised in imme
diate proximity to the point at which the de ‘ mounted in the bearings, depending upon the
pressed plaits are to be formed, the center of length of the blanks to be produced. One of the
the loop may be held in accurate registration rolls may carry cutters M which will act against
the opposite roll as an abutment to produce suc
with the contact-periphery of the disk, and uni
cessive horseshoe-shaped incisions a (Fig. 4) in
formity of the plaits is insured.
A further object of the invention is to provide the compound webs A advanced between them,
and from which blanks are to be formed. These
for the ready arrangement of the‘ plaiting mecha
incisions constitute the ends of slots dividing the
nism for operation upon work of di?erent dimen
sions. The blanks to be produced may differ corner-laps of the ?nished blanks from the end
wings and their extensions, as in the box-blanks
both as to length and width. In the former case,
since the blanks during formation are advancing, produced by the machine of the patent. At the.
stage in which the work has reached, the mate
as a part of the Webs, longitudinally between
pairs of rolls Which operate upon the work, these rial may consist of a shell-web b of pasteboard
rolls must change in diameter as the blank-length
is to be altered. This causes the vertical position
of the bite of‘ the rolls and consequently the plane
in which the work lies to vary. To compensate,
55 for this, I arrange for positioning the depressing
30
or the like, a liner 0' of paper, adhesively attached
to one side of the web b, and kraft or other
paper stays e, e, also adhesively secured to the
opposite margins of both edges of the webs b, c
and extending along the longitudinal edges of the 55
2
2,106,271
completed blanks. Generally, the loops of these
stays lie in close proximity to the edges of the
shell-material, but at de?nite intervals along the
webs there have been out, before the application
of stays, notches q. These notches lie at the
outer edges of what are to become the corner
laps of the box-blanks. They are for the pur
pose of receiving the turned-in end-wing-exten
sions to produce ?ush edges about the entire
10 wall of the set-up box-part. To prevent the stays
‘from interfering with the reception by the
notches of the folded-over extensions; it is de
sired to depress said stays into the notches and,
in doing this, to plait them into two substantially
15 symmetrical folds lying side by side. When thus
operated upon, the stay in each notch presents
four layers lying side by side, as appears in Fig.
the disk 50 lies substantially in horizontal aline
ment with the longitudinal center-line of the
loop of stay 6. The vertical position of the stay
will correspond to the diameters of the rolls [2
which are employed. The carrier-bar 38 is posi
tioned horizontally upon the lever 22 to bring
the apexof the disk-periphery close to the edge
of the shell-web b. The edge of the compound
web now travels between the guide~surfaces 54,
54 with the center of the loop of stay in regis 10
tration with the apex of the disk 50 and retained
againstlateral displacement. The sections of the
cam 28‘are ?xed in such a relation that as the
web travels by the disk D, contact of the cam
with the roll ‘24 will swing the lever 22 inwardly 15
to force the disk50 against the loop of stay e
just as the beginning of a notch q reaches it. The
3, instead of two, as is the case with the loop V-periphery of the disk presses the center of the
before the plaiting operation has been performed. stay into approximate contact with the bottom
The strength of the stay-material at the corners of the notch, plaiting it into a double loop, the 20
of the box, where the severest rupturing strains outer edges of which will lie within the notch.
come, is thereby greatly increased.
When the extremity of the notch arrives at the
In describing my improved means for accom
disk, said disk is released by the cam, and the
plishing the symmetrical depression of the stay
spring 26 draws it into an inactive position. This
material, but one side of the machine will be is repeated for each notch. It will be seen that 251
considered, it being understood that the mecha
the stay-material may not only be disposed ef
nism may be duplicated at the opposite side. Se
fectively within the notches for blanks of all sizes,
cured to the inner face of the frame is a bracket
but that the retention of the blank-material
l6 at the rear of the rolls [2, I 2 and approxi
against displacement at the exact point of plait
30 mately at the horizontal plane of the bite of said ing action will result in an unfailing symmetry of 30.
rolls. Fulcrumed at l8 upon the bracket, and the double folds within the notches.
'
extending forwardly substantially parallel to the
Having described my invention, what I claim,
plane of the advancing compound web A be
as new and desire to secure by Letters Patent of
tween the journals 20 of the rolls, is a lever 22. the United States is:
35 Rotatable upon the outer side of the lever is an
1. In a blank-making machine, a rotatable 35
antifriction-roll 24 drawn by a spring 26 against member provided with a portion arranged to act
the face of a cam-projection 28. The cam is upon the edge of ‘an assembly of shell-material
formed upon two plates, one designated as 30
carrying along said edge a projecting loop of
which has'a hub 32 fast upon the journal of the thinner material to depress the projecting loop
40 lower roll, while the other, 34, is secured'to its
companion .by slot-and-screw connections 36.
This arrangement permits the time to be varied
during which the lever 22 is forced inwardly by
the cam-projection. Extending horizontally-from
45 the end of the lever opposite the fulcrum is a
carrier-bar 3B, the relation of which to the adja
cent edge of the advancing material may be al
tered by slot-and-screw connections 40. At the
inner extremity of the carrier is a vertical bore
50 having a wall divided at 42, and in this bore may
be clamped in different vertical relations by a
screw 44 a bearing sleeve or holder 46. The sleeve
receives rotatably a spindle 48 having fast upon
its upper extremity a compound stay-depressing
55 and -plaiting and web-guiding member D. The
depressing and plaiting element consists of a rel
atively thin disk 50 having a V-shaped periphery.
Both above and below the disk 50 is a guide-disk
52, the inner face 54 of which lies against that of
60 said disk 50. The space between the two faces 54,
54 is such as to admit and allow the free advance
of the combined webs of material with negligible
lateral play. The periphery of each of the disks
52, outside the face 54, has an inclined surface 56,
65 these two surfaces 56 converging inwardly to form
a throat for the ready reception of the webs.
In using my improved depressing and plaiting
mechanism, the disk D, having between its sur—
faces 54, 54 a space of the proper width to admit
70 and position a compound web A of the thickness
to be operated upon, will be applied to the holder
sleeve 46. It will be adjusted in a direction sub
stantially perpendicular to the plane of the com
pound web by a movement of the sleeve in the
75 carrier-bar 38 until the apex of the periphery of
and with portions arranged to guide the assembly
with negligible lateral play for such depression.
2. In mechanism for operating upon an asseme
bly of shell-material carrying along its edge'a‘
projecting loop of thinner material, a disk pro
vided with a V-shaped periphery for contact with 45
the edge of the loop, and means at opposite sides
of the disk and substantially parallel therewith
for locating the loop transversely with its center
in substantial registration with the apex of the
disk-periphery.
3. In mechanism for operating upon an assem
bly of shell-material carrying along its edge a
projecting loop of thinner material, a member
comprising a plaiting disk for contact with the
edge of the loop- and a guide-disk at each side of
said loop, the plaiting disk and guide-disks lying
in substantially parallel planes.
4. In mechanism for operating upon an assem
bly of shell-material carrying along its edge a
projecting loop of thinner material, a member
comprising a plaiting disk provided with a V
shaped periphery for contact with the edge of the
loop and guide-disks having substantially parallel
walls situated at the opposite sides of the disk
periphery and inclined walls converging inwardly
toward the parallel walls.
5. In a blank-making machine, a pair of rolls
between which the shell~web and a loop of at~
tached stay-web pass, said rolls being mounted
for interchange with other rolls, a rotatable loop 70
plaiting disk co-operating with the rolls near the
bite, and means arranged to position the disk
differently to correspond to the bite of different
rolls.
6. In a blank-making machine, means for ad
2,106,271
vancing shell-material carrying along its edge a
projecting loop of thinner material, said advanc
ing means being mounted for interchange with
other advancing means, means contacting with
the loop in its travel to depress the projecting
portion, means arranged to position the depress
ing means to correspond to different planes in
which the material may advance, and means ar
ranged to vary the normal position of the de
pressing means toward and from the loop.
10
'7. In a blank-making machine, a pair of rolls
between which the shell-Web and a loop of at
tached stay-web pass, said rolls being mounted
for interchange with other rolls, a rotatable loop
plaiting disk co-operating with the rolls near the
15
bite, means arranged to position the disk differ
ently to correspond to the bite of di?erent rolls,
and means arranged to ?x the disk in different
positions toward and from the path of the webs.
20
25
8. In a blank-making machine, a roll for oper
ating upon an advancing web of shell-material
carrying along its edge a loop‘ of stay-material,
a cam carried by the roll, a lever extending along
the path of the material and actuated by the
cam, a carrier extending transversely of the lever
toward the web, a stay-plaiting disk rotatable
upon the carrier, and means arranged to vary the
position of the carrier upon the lever toward and
from the web.
3 a
9. In a blank-making machine, means for op
erating upon an advancing Web of sheet-mate
rial carrying along its edge a loop of stay-mate
rial, a lever situated adjacent to the path of the
web, means for oscillating the lever, a carrier-bar
variable in position upon the lever, a sleeve
mounted upon the bar, means for clamping the
sleeve in different positions upon the bar, and a
stay-plaiting disk rotatable upon the sleeve;
10. In a blank-making machine, a roll for oper 10
ating upon an advancing web of shell-material
carrying along its edge a loop of stay-material, a
cam carried by the rollland comprising actuating
sections variable in position with respect to each
other, a lever extending along the path of the 15
material and actuated by the cam, and a stay
plaiting disk rotatable upon the lever.
11. In a blank-making machine, a frame, a pair
of rolls rotatable therein and between which is
advanced a web of shell-material carrying along 20
its edge a loop of stay-material, a cam rotatable
with one of the rolls, a lever fulcrumed upon the
frame and extending from its fulcrum-point
substantially parallel to the path of the web to
receive contact of the cam, and a stay-plaiting 25
disk mounted upon the end of the lever opposite
the fulcrum.
ROBERT M.- DALLAS‘
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