close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2132460

код для вставки
Oct. 11, 1938.
H. A. CUMFER
2,132,460
CUTTING DEVICE
Filed Decf4, 1935
2 Sheets-Sheet l
S
®
È
lNvENToR
#4R/17 A fam/ff?
BY
`
,
M4146 f4
`
¿l
'
.
ATTORNEYS
Oct. 1l, 1938.
H. A. CUMFER
2,132,460
CUTTING DEVICE
File-d Dec. 4, 1955
2 Sheets-Sheet 2
2,132,460
Patented oct. 11, 1938
I
UNITEDA STATI-:s2,132,460PATENT Aorricle:
' CUTTING DEVICE
Harry A. Cumfer, Chicago, Ill., assigner to United
States Gypsum Company, Chicago, Ill., a cor
poration of Illinois
Application December 4, 1935, Serial No. 52,773
V9 Claims.
(Cl. 164-33)
This invention'relates to the manufacture of
covering elements and more especially to the pro
duction of rooñng elements intended to simulate
aplurality of shingles or similar rooñng elements.
The invention particularly relatesto produc
ing, from sheets of fabric `impregnated land
coated with bituminous materials, covering ele
,
body of the rotor, a port being provided leading
to a central cored chamber in the rotor or in
some cases leading again to the circumference of
the rotor at a place peripherally removed from
the cutting knife. Such cutting devices, however,
have -the disadvantage that owing to the adhe
sive character of the pieces so removed and be
cause of the limited cross-section of the chan
ments in which the units are simulated by tabs
upon the element separated by spaces or cut-outs
formed by removal from‘thesheet of a` portion
nel the movement through the channel and
through the port to clear the rotor of such pieces 10
thereof.
is interfered with or stopped. When this occurs
`
_
‘
n
Roofing strips intended to be laid in courses
with the length of the strip in the coursewise di
rection and having formed upon one lengthwise
the process of cutting the elements must» be
stopped in order to clear the rotor before pro
edge of the strip a plurality` of tabs'separated by
cut-outs heretofore have b'eenfproposed in many
forms. Such strips have been .made by various
forms of cutting devices, including the so-called
cylinder cutters in which the cutting knives are
The invention of the present application pro
vides a positive means for moving the portions
V20 mounted upon `the periphery of a rotor and the
sheet is delivered in tangential or peripheral con
tact with the rotor and in such relation to the
fering with the cutting action of the knife and
effects a positive movement of removal of the
I15
blade that when the knife has passed through the
point of tangency of the sheetwith the rotor the
2,5 sheet »will have been severed by said knife. In
this action the motion of' the knife in, its pe
ripheral movement about the axis of .rotation has
a component which is in a directiony transversely
of the surface of the sheet, which effects the
30 cutting of the sheet'to sever one portion` thereof
ceeding. ‘
or pieces severed by the cutting knife soI as to
clear this knife of said severed pieces. lThe in
vention provides for such removal Without inter
lsevered piece after completion of the severing
cut. The invention further provides for the pos
itive ejection of the severed piece from the cut
ting device so that the knife is cleared of 'con
tact with the-severed pieces before again coming
into cutting relation with the sheet. This action
of the device of the present invention may be
accomplished with materials of different kinds
but is especially eifectivewhere the pieces which 30
are severed are adhesive because of their being
from the other. The present invention isv par
ticularly concerned with cutting .cylinders or` saturated or coated with adhesive materials, as
equivalent devices' which are, utilized for cutting in the manufacture of roofing elements.
While a simple embodiment of the invention
sheets in this manner.
ï
In` the manufacture-.of shingle strips or other is shown in the drawings and is described in the
covering units in which slots or cut-outs are specification, the invention finds application to
formed a problem arises in the removal ofthe cutting devices having different forms. It is a
feature of the invention, however, that similarly
vpiece of material cut from the lsheet in the for
mation of. theslot or cut-out. Especially When to the embodiment illustrated and described, the
invention finds particular application in those
40 sheets of fabric are impregnatedor are impreg
nated and coated with bituminous materials, such devices in which the cutting action proceeds in
as asphalt _or other mastic and adhesive saturants a continuous manner from the start of the cut
ting to the completion thereof and especially
and coatings, the removal of the pieceof mate
rial corresponding to the slot becomes diiìicult lwith concomitant motion of the sheet. This con
comitant motion which, in the embodiment il 45
45 because of the adhesiveness of these saturants
> and coatings which causes the vpiece to cling toA lustrated, is that occurring in feeding the sheet
the cutting device. Itbecomes necessary to take tangentially to the peripheral motion of the
‘measures to insure the removal of Ythis piece if rotor, is combined with a motion of the knife
damage to the elements being made is not to as stated above, which is transversely of the
occur and if‘proper action of the cutting device movement of the sheet or has a component in
said transverse direction. In the embodiment il
is to be secured. ,
.
,
_
Heretofore it has been suggested to remove this lustrated this is accomplished merely by the
piece of material by forcing the successive pieces motion of the knife along the circumference of
inwardly toward lthe axis of the rotor> through the circle about the axis upon which the rotor
55
channels or vaults formedïas 'by coring in the rotates.
2
v2,132,460
In order to effect removal of the severed piece
from contact with the knife the device of the
invention provides means positioned adjacent
that it may be moved transversely of its length
the knife and arranged to be moved with re
the ejector bar 21 is at the portion of the recess
1 of the rotor.' As illustrated in Figures 1 and 2,
spect to the knife in a direction of said trans
25 toward the axis 1.
verse movement or ofV said component.
In the
may be seen a space between theV bar 21 and the
illustrated embodiment the movement of said
device is transversely of the peripheral extent of
the rotor and, therefore, is transversely of the
surface of the sheet when the knife is in cutting
position. By this motion transversely of the sur
face of the rotor ejection of the severed piece
bottom face I8 of the block I3. Fastened to the
ejector bar 21 by means of bolts 29 tapped in the
from the rotor and from contact with the knife
is secured and also recession of the means for
effecting the ejecting may be accomplished so
as to avoid interference with the cutting action
of the knife when said knife is in cutting rela
tion to the sheet. The means by which this mo
tion transversely of the periphery of the rotor is
20 accomplished will be more clearly understood,
as -will be the operation of the device of the in
vention in the production of covering elements,
from the description to follow in connection with
the drawings in which
Figure l shows in part a longitudinal section
and in part an elevation of the device of the
invention;
so
in a direction outwardly and inwardly of the axis
Figure 2 is a section on line 2--2V of Figure 1;
Figure 3 shows an end elevation of the device
of the invention; and
Figure ‘l is a side view in outline of the same.
In the drawings the rotor I is constructed with
a body 3 which may be cast or forged in gen
erally cylindrical form and may be provided with
a shaft 5 cast integrally therewith and turned
Vconcentric with the axis 1 of the cylinder. In
the drawings the shaft 5 is shown extending at
oneside of the rotor, only one-half of the length
of the particular rotor illustrated being shown in
the drawings. The shaft when mounted in suit
able‘bearingsindicated by 8 makes possible the
rotating of the rotor `upon its axis 1 by any
suitable mea-ns, as by a spur gear on either or
both ends of the shaft and fitting into the driv
` ing train of the machine. A sheet of material I3,
Fig. 3, may, therefore, be contacted and severed
when passed between the rotor I anda counter
cylinder or anvil roll 3.
In the periphery of the body 3 of the rotoris
Outwardly of the bar 21
bar 21 is a block 3| of such cross section as to
ñt the slotted portion 2|) of the block I3 and to
pass up between the blades I5 of the knife I4.
The dimension of the block 3| outwardly from
the bar 21 is such that when the bar 21 is in the
recessed position, as shown at the top of Figures
1, v2 and 3, the outer end of the block 3| is in
wardly of the cutting edges of the knife I4 so
that, as may be seen in Figure 3, the sheet I0
may be cut'by the knife I4 without interference
ofthe block 3|.
Upon the ends of the ejector bar 21 are mounted "20
rollers `35 fitted to run upon-the turned portion
31 of the barl21. AThe turned portion 31 of the
bar 21v projects beyond the end face 4 of the rotor
bodyl 3 so that the roller 35 is exterior to the body
3 of the rotor.
A cam or eccentric plate 40 is formed as a ring
>with its internal diameter fitting to the shaft 5
and held against the body 3 ofthe rotor by
means of the end of `a stationary bearing sleeve
or block 4| for the shaft‘5, by meansof set-screws 30
42 passing through a flange ring of plate 40
which snugly fits over the end of the said bear
ing. AIn the face of thecam plate 40 is formed a
camgroove having-its outer face 43 parallel to
the inner face 44 and of such width between said
cam faces and of such depth inthe inner face
of the camplate 40 that the cam roller 35 may
>flt into they groove thus formed in the cam plate
40 with a running clearance when the plate 49
is positioned against the body 3 of the rotor and
held in engaging stationary position with the
cam roller 35 by the bearing 4| as described.
The cam surfaces 43 and 44, which are shown
in do-tted line in Figure 3, in the particular em
bodiment illustrated are cylindrical surfaces 45
parallel to each other. These surfaces, however,
formed a recess orsocket II within which may
are formed eccentric with‘the axis 1 of the rotor.
The cam plate 40 is held from rotation by means
of thestationary bearing 4| and the set-screws
'42. A bracket 41 is suitably fastened to the frame 50
of .the machine or, as shown, to the cam plates
40 at the ends of the rotor by means of the
screws 49 tapped in the cam plate 40. Also for
means of bolts 2| having the heads23 thereof
countersunk-in-the block I3 and tapped into the
body 3 of the rotor the block I3 may be held
securely in the Yrecess II. By removal of the
bolts 2| the block I3 may be withdrawn bodily
plate having a similar groove formed with eccen
tric Ycam surfaces 43 and 44 and positioned in
like relation as to direction of eccentricity with v65
respect to the axis 1 of the rotor. A similar
fastening means, as «by the bearing“ and screws
42, may =be used at each end. These means of
50 be mounted arblock .I3 carrying the knife I4.
Said knife, as formed in the particular embodi
ment illustrated, is provided with blades I5 bear
ing upon the shoulder l5 formed in the block I3. ' each cam plate a pin 50,may be provided. A
By
means of screws I1 passing'laterally through wiper or stripper 5| of rubber‘or other flexible 55
55
the block I3 from each side thereof andhaving or resilient material is secured to the horizontal
the heads I3 countersunk in the block I3, the portion Vof `bracket 41 with its opposite free edge
knife |4 is held in place in the Lblock I3, the projecting into the path of the ends of the ejector
screws being tapped into the blades I5 of the blocks 3|, as seen in Figure 3, to brush off any
cut out portions having a tendency to stick to 60
60 knife I4. The block I3, together with the knife
-I4, securely held therein as described, may be the ejector blocks 3|. A cam plate 40 ymay be
inserted in and removed from the recess I I. By provided at each end of the rotor I, each cam
from the recess and thereafter the knife I4 may
be removed from the block for the purpose of
,
70 grinding or replacement.
The body 3 of the rotor also is longitudinally
recessed at 25 as shown in the cross-section in
Figure 2 to provide a space within which the
ejector bar 21 may be arranged, said bar being
75 of such cross-section with respect to the recess
fastening prevent rotation of the cam plates "4U
when the rotor cis rotated upon its axis ’1 to bring 70
the cutting knives into cutting engagement with
the ’sheet 'IU kas the sheet moves tang'entially to
the rotor
In >view of the eccentrícìty of the cam surfaces
43 `and. î44 and the .engagement Vof the roller -35 75
Y2,132,460
-3
therewith it will now be understood that, as the
rotor rotates upon its axis and as the Vbody 3
of the rotor carries the bar 2‘I and its block
3| around the axis V'I, the camroller 35’will be
of the ejector mechanism and the cam roll 35 and
-the cam surfaces 43 and 44 are protected against
damage due to grit and interference with their
moved outwardly and inwardly with respect to
lFigure 4 shows in diagrammatic outline the
complete rotor in which two circumferential rows
the axis 1 of the rotor in a complete revolution or
rotation upon its axis; Thus the block 3| will
be moved outwardly and inwardly within the
space between the blades I5‘of the knife I4. In
10 a rotation'from the position shown in Figure `3
where the upper Aknife is in cutting engagement
with the sheet I0 and the block 3| is withdrawn
below the edges of the knife blades I5, the block
3| will be moved outwardly between the blades
15 until at the quarter revolution substantially the
outer face 32 of theY block 3| may be at the periph
ery corresponding to the cutting edges of the
knife blade I5.r In thismovement the piece of
material which may be retained from the cut just
20 finished between the knifeblades 4I5 has been
pushed out between these blades land may fall
clear of the rotor. If by the adhesiveness of the
saturating or coating materials or for other rea
son the piece adheres to one or the other knife
25 in the next quarter revolution, a further move
mentv of the block 3| is produced to completely
pushthe severed piece clear of the'knife blades
I5. If the piece >still clings, the brush, wiper or
stripperA 5I engages and effectually‘removes it.
'30 Thereafter upon further rotation of the rotorthe
block 3| recedes again between the knife blades
operation.
or sets of knives I5 are shown, that being the
usual arrangement, though of course any num
ber of rows or length of rotor may be provided.
These knives or associated parts are all of the 10
same construction, arrangement and operation as
those specifically shown and described, except
that the longitudinal recesses in the rotor and
the ejector bars 21 therein suñice for the plurality,
in this instance two, of knife assemblies, ejector l15
blocks 3|, etc. which are disposed in the same
longitudinal line of the rotor. Thus a single
ejector bar serves as the operating means for a
plurality 'of ejector blocks.
Various modifications of the invention from
that illustrated in` the drawings and particularly
described may be made without departing from
the sipirit of the invention. Different forms of
mechanism to produce the motion of the ejector '
block 3| may be utilized which secure the proper 25
time relation between the ejecting action and
the cutting of the sheet. All such variations are
within the scope of the invention and are in
tended to be covered by the claims.
'
I5 and when the blades ` I5 are about to come
Having thus described my invention, I now 30
claim:
1. In a rotary cutting device, a knife blade
into cutting relation with the‘sheet I0 the-face
mounted adjacent the periphery thereof with
32 of the block 3| has receded below the edges of
35 these blades so that the cutting may be started
and completed without interference by the
block 3|.
It will be understood that although in the illus
trated embodiment the cam surfaces have‘been
40 shown in the simple form provided by parallel
cylindrical surfaces eccentric to the axis of the
rotationof the rotor, other forms of cam surfaces
may be used to effect a quick ejection or a dwell
in the different portions of the revolution. 'I‘he
device illustrated, however, provides an easy mo
_tion which is mechanically positive and is effec
tive to move the ejector block between the knife
blades and to eject the severed pieces frombe
tween the blades. No complicated kinematic mo
50 tions are involved, and the parts may be readily
removed for renewal orv repairs. ` Such removal
may be effected by removal -of the rotor unit and
the bearing as a whole from the machine frame
or housing and disassembling the parts. The
55 knives may, of course, be quickly removed with
out taking out the rotor. The rotor may be
provided also with suitable severing knives or
blades as indicated in dotted lines in Figure 1,
a circumferential knife or blade being indicated
60 at 85 and a longitudinal knife or blade at 89,
these being arranged, supported and secured in
any desired or usual way.
In Figure 1 in the cam plate 40 is shown a
groove |00 cut in the inner face of the plate ad
65 jacent the periphery thereof in such position as
to be covered by the end of the body 3 of the
rotor I or by the filler plates |02. 'I'his groove
preferably is filled with a felt gasket or washer
of suitable size and section to bear against the
70 end of the body 3 and the filler plates |02 as the
rotor I is rotated between the cam plates 40». This
gasket serves to prevent dust or grit or other for
eign material passing between the body 3 of the
ro-tor I and the cam plate 40 and entering the
75 recess 25. Thus the internal reciprocating parts
one of the faces or said blade which form the
cutting edge extending in a plane transversely of 35
the peripheral ‘extent of the device, a member
adjacent said face of the device arranged for
movement in a direction generally parallel to
said face of the blade, a cam surface described
around the axis of rotation of said device, and 40
a cam roller arranged for rolling upon said cam
surface and connected to said member, said parts
being arranged so that upon rotation of the de
vice said member is moved outwardly from said
axis.
45
2. In a rotary cutting device, a knife blade
mounted adjacent the periphery thereof with
one'of the faces of said blade which form the
cutting edge extending in a plane transversely
of the peripheral extent of the device, a member 50
adjacent said face of the device arranged for
movement in a direction generally parallel to
said face of the blade, a fixed member providing
a cam surface described completely around the
axis of rotation of said device, means carrying a 55
cam roller and fastened to said member so as to
move therewith and formed and arranged to hold
said cam roller in contact with said cam surface
as said device rotates upon said axis, whereby
reciprocal movement of said member in said di 60
rection is effected.
3. In a rotary cutting device, a rotor arranged
to rotate upon an axis and having a periphery
generally concentric with said axis, said rotor
being formed to hold a knife having a blade 65
Ywith that face of said blade which, with the bevel
face of the blade, forms the cutting edge of the
knife in a plane generally transverse to the pe
riphery of the rotor, a ring fixed with respect to
said axis of rotation and providing a surface sur
70
rounding said axis eccentric to the periphery of
said rotor, said rotor providing adjacent said
face of the knife blade a slot extending gener
ally parallel to said face, an ejector block mov
able in said slot in said direction parallel to said 75
4
face, a bar fastened'to saidblock and arranged
with an end thereof adjacent said eccentric sur
interchangeable longitudinal bars in said slots
>andv spaced from the circumference of said cylin
face and-providing an axis substantially parallel
derffmeans-for'bodily lateral movement of said
to said eccentric surface, and a roller larranged
barsï during-a rotation of said cylinder, inter
changeable çutter blocks substantially flush with
to turn'upon> said axis provided by said bar and
to roll upon said eccentric surface to cause move
ment of `said block loutwardly and inwardly in
said slot upon rotation of said rotorrupon its axis.
4. In a rotary cutting device as in claim >3,
means for moving a sheet of material into Vpe
ripheral cutting contact with said knife when
saidblock is at a point inwardly of.A said slot to
leave the blade free of interference with the cut
ting, said parts being so arranged that upon out
ward movement of said block the portion of the
sheet severed at said face of the blade is moved
out of contact therewith.
5. In a cutting machine of the character de
scribed, a movable knife support for cutting co
120 operation with an anvil„said support having an
open end T shaped slot in the surface thereof ex
tending the entire length of said support and
providing longitudinal shoulders, a longitudinal
ejector bar in said slot below said shoulders and
125 arrangedY for bodilyA lateral- movement therein,
a cutting block on said shoulders, outwardly ex
tending knives on said cutting block substan
tially vin lateral alignment with said bar, lan
ejector memberA between said knives and mov
able with said bar, automatic means for moving
said bar during movement of said support and
iiller blocks closing said T slot between said cut
ting blocks.
.
6. A cuttingl rotor of the character described
comprising a cylinder having a plurality of
longitudinalradially disposed open end slots ex
tending therentire length of said cylinder, elon
gated interchangeable longitudinal bars
said
slots and spaced from the circumference of said
cylinder, means for bodily later-al movement of
said bars during a rotation of said cylinder, in
terchangeable cutter blocks substantially flush
with the surface of said cylinder, said blocks
having openings therein substantially in radial
alignment with said bars, said blocks having out
wardly extending cutting edges deñning said
openings, and ejector members on said bars and
substantially iilling said openings, and ñller
blocks closing said slots between said cutter
blocks.
7. A cutting rotor of the character described
comprising a cylinder having a plurality of longi
tudinal radially disposed open end slots extend
ing the entire length of said cylinder, elongated
the surface of said. cylinder, said blocks having
openings therein substantially in radial align
_mentwith said bars, said blocks having outwardly
extending cutting edges defining saidopenings,
ejectorlmembers on said bars and substantially
filling said openings, and means accessiblelfrom
outsidesaid cylinder to enable removal of said
il)
ejector blocks through said openings.
8-.fI'n a cutting machine of the character de
scribed, a cylindrical cutting rotor arranged for 15
continuous rotation for cutting cooperation with
an anvil roll, said rotor having longitudinal ra
dially disposed T shaped peripheral slots, the
T. slots providing longitudinal shouldersflongi
tudinal bars in said T slots below the said .shoul
20
ders and arranged for radial reciprocatingv move
ment therein, cutting blocks supported on said
shoulders and having their outer surfaces form
ingcontinuations ofthe surface of said rotor,
said cutting blocks having kopenings therethrough ,
iniradial alignment with said bars, cutters on
opposite -sides of said openings and extending
beyond the surface of said rotor for cutting co
operation with said anvil roll, ejector members
removably secured' to said bars and substantially 30
ñlling the openingbetween said knives and ter
minating below the cutting edges thereof, and
means for reciprocating said bars during a revo
lution of said rotor to cause said ejector members
to ejectcut portions from between said knives.
35
'9. A cutting device of the character described
comprising a rotor having a longitudinal cham
ber completely therethrough between the axis and
the yface of the rotor, a Anormally fixed member
substantiallylsealing each end of said chamber 40
and arranged to permit rotation of said rotor
therebetween, a longitudinal ejector bar in said
chamber, meanslto cause automatic lateral re
‘ciprocation ofy said ejector bar during movement
of said rotor, said chamber forming a substan 45
tial passage past said bar during its movement,
spaced cutting knives on said- rotor substantially
in radial alignment with said bar, an ejector
member on said bar and extending through the
rotor wall and between said knives, and provid 50
ing a substantially sealed joint between said
member and the-rotor Wall.
HARRY A. CUMFER.
Документ
Категория
Без категории
Просмотров
0
Размер файла
833 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа