close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3071343

код для вставки
Jan. 1, 1963
G. LOOSER
3,071 ,333
WEB‘ CHANGING DEVICE
Filed July 21, 1958
2 Sheets-Sheet l
INVENTOR.
fwézé m1,
Y/WMM f {M0
Jan. I, 1963
G. LOOSER
3,071,333
WEB CHANGING DEVICE
Filed July 21, 1958
2 Sheets-Sheet 2
INVENTOR.
Agar/b7
3,671,333
Patented Jan. 1, 1963
2
3,071,333
Gottlieb Looser, Zurich, Switzerland, assignor to Ver
waitungsgesellschaft der Werkzeugmaschinenfabrrk
WEB CGING DEVICE
the end of web 9 is provided with an adhesive, or the
materials unrolled may be adhesive, so that the ends
of the webs are attached to each other and the leading
end of the new web is carried forward. Both webs
Oerlilron, Zurich-(Perlikon, Switzerland, a company of 5 therefore move in superposed ‘and parallel relationship
Switzerland
Fiietl July 21, 1958, Ser. No. 749,683
3 Claims. (Cl. 242—58.2)
The present invention relates to a Web changing and
until the roll 8 is spent. Since the roll 10 is positively
driven, the joining operation between the two webs can
be effected without any stress on the webs.
In the course of the unwinding operation the roll 10
10 is then swivelled into the position previously held by
unwinding device.
the roll 8 and the empty shaft 5 is swivelled back so that
A ?rst object of this invention is to provide a device
it can be replaced by a shaft carrying a new full roll
for joining a new web to the end of an unwound web
(FIGS. 3 and 4). The new roll is then turned in the di
without causing any tension or stress in the webs.
rection of arrow B so that it is ready for operation (FIG.
A further object of this invention is a continuous opera 15 5) when the end of the unwinding roll approaches.
tion with a smooth transition from the ?rst web to the
A preferred embodiment will now be described with
second web without interruption of the operation of a
reference to FIG. 6. The design of the rotary roll drive
web-treating machine which may apply a coating ?lm to
is such as to enable braking of the rolls so as to exert
the webs.
a certain pulling action on the web 9.
Yet a further object is a device which is easy to oper 20
The main shaft 1 includes an inner shaft '12 and an
ate, simple in design and permits a replacing of the
outer hollow shaft 11 connected by arm 62 to a driven
web rolls during a continuous operation.
shaft 11a. Shaft 12 is driven by a motor 13 through
An embodiment of the device according to this inven
gears 14, and shaft 11 is independently driven by motor
tion is shown in the drawing in which:
15 through gear 16 and shaft list. As best seen in FIG.
PEG. 1 is perspective view of the web changing de 25 6, arms 6 include a ?rst pair of arms 61 and 62 support
vice,
ing web roll-supporting shaft 5, and a second pair of
FIGS. 2-5 [are schematic side views showing various
arms 63 and 64 supporting web roll-supporting shaft
stages of the unwinding, unrolling and web changing
operations.
FIG. 6 is a perspective view on an enlarged scale il
lustrating a preferred embodiment partly in section.
The web changing device according to FIG. 1 com
means 4. Arm 62 is hollow and houses transmission
means 162 which are driven through a pair of bevel gears
30 163 for a motor 65. Consequently, arms 61, 62 can be
turned together with shaft 11, 11a by motor 15, while
motor 65 drives shaft 5. Arms 63 and 64 turn with
shaft 12 under control of motor 13, while shaft 4 is
supports or hearing blocks 2, 3. Arranged in parallel
driven through transmission 66 in arm 63 and bevel gears
relationship with shaft 1 are two web-roll supporting 35 67 by motor 68. Motors 13 and 68 are located in one
shaft means 4, 5 over which the web rolls to be unrolled
support 3, and motors 15 and 65 are located in the other
8, it) are slipped. These two shafts 4, 5, which are ar
support 2. Motors 13 and 15 constitute operating means
ranged between the two bearing blocks 2, 3 are connected,
for turning shafts 4 and 5 between a loading position
by arm means 6 with the ends of the central shaft 1
shown on the left of FIGS. 3 and 4, a web-changing
and can be swivelled about the said main shaft 1 inde 40
postion as shown at 10 in FIG. 2, and a web-unwinding
pendently of one another.
position as shown at 8 in FIG. 2. Motors 65 and 68 are
prises a central main shaft 1 whose ends are supported in
The relative adjustment angle between the two shaft
means 4, 5 exceeds 180°, but is less than 360° i.e. with
one shaft immobile the other shaft can be swivelled by
over 180° relative to the former. Both web-roll sup
porting shafts can, in addition, be rotated completely
about the main shaft 1. This rotation is performed by a
drive located within the bearing blocks 2, 3. A driving
motor and associated transmission means cause inde
not only capable of driving shafts 4» and 5 but also of
braking the same when driven as generators when the
respective shaft is rotated in the unwinding position by
the unwinding web.
The webs may be formed of any thin ?exible material,
such as paper, plastics, textiles, metal foils and the like.
The device disclosed can obviously be used not only for
unwinding web rolls, but also for winding up webs since
pendent the swivelling movement of either shaft 4, 5 50 this
merely involves a kinematic reversal.
about the axis of main shaft 1. Actuation of the trans
Having
now particularly described and ascertained the
mission means is controlled from a control desk.
nature of my said invention and in what manner the
The web 9 of the unwinding loeb roll 8 passes about
same is to be performed, I declare that what I claim is:
guide roller 7 and then enters the machine provided for
1. Web-changing and unwinding apparatus compris
processing the Web, such as a laminating, printing or
ing, in combination, two parallel web roll-supporting
any other machine designed for ?nishing or processing the
shaft means; a main shaft parallel to said shaft means;
web, for example by ‘coating the same with a plastic
two supporting means supporting each of said web roll
?lm.
supporting shaft means for independent turning move
Referring now to FIGS. 2 to 5, the device operates as
men’: about said main shaft between'a loading position
follows:
for receiving a new web roll, .a web-changing position,
The roll 8 from which the band-type web 9 is unrolled
and a web-unwinding position for unwinding a web roll
rotates about its axis together with the shaft 5, the web
along a path substantially tangential to a new web roll
9 passing over the guide roller 7 and then into the proc
on the respective other shaft means in said web-chang
essing machine. Towards the end of roll 8, a second new
ing position, each of said supporting means including a
full roll 10 of substantially equal width is caused to ro 65 pair of arm means one of which is hollow; and two drive
tate in the direction of arrow A (FIG. 2) by means of an
means respectively connected to said two shaft means
electric drive motor so that its peripheral speed approxi
for driving the same independently of each other, and
mates the speed of the web 9. Shortly before the end
being operable to rotate the respective associated shaft
of the roll 8 is reached, the shaft 4 with the roll 10 carried
means when the same is in said’Web-changing position
thereby is swivelled about the axis of main shaft 1 to 70
until a new web roll thereon has a peripheral speed sub
wards the roll 8 until the surface of roll 10 touches web
stantially equal to the speed of a web unwound from the
9 (FIG. 2). The outside of the free end of roll 10 or
other shaft means in said web-unwinding position, each
3,071,333
of said drive means including transmission-means located
in the respective hollow arm means; and two operating
means respectively operatively connected to said sup
porting means for turning said shaft means about said
main shaft independently of each other so that one shaft 01
means can he turned ‘from said loading position to said
web-changing position for attachment of a new web r011
thereon to the web unwound from the other shaft means
in said web-unwinding position, and so that the other
shaft means can be moved from said web-unwinding
position to said loading position and the shaft means in
said web-changing position can be moved to said web
unwnding position when the web roll on the other shaft
means is completely unwound.
2. Web-changing apparatus as set forth in claim 1
wherein said main shaft includes an inner shaft and a
hollow outer shaft receiving therein part of said inner
shaft; wherein one pair of arm means is secured to said
hollow outer shaft, and the other pair of arm means
is secured to said inner shaft for turning movement; and
wherein one of said operating means drives said inner
4.
shaft, and the other of said operating means drives said
outer shaft.
3. Web-changing apparatus as set forth in claim 2
and including a pair of hollow supports for said main
shaft; and wherein said drive means and said operating
means are motors, two of said motors being located in
each of said hollow supports, the motor driving said inner
shaft being located in one of said supports and the motor
driving said outer shaft being located in the other of said
supports.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,569,650
1,908,490
1,932,642
Coldwell ___________ __ Jan. 12, 1926
Scott ________________ __ May 9, 1933
Schmidt ___________ __ Oct. 31, 1933
2,686,015
2,772,054
2,776,802
Stevens ____; ________ __ Aug. 10, 1954
Herele et a1 ___________ __ Nov. 27, 1956
Phelps _______________ __ Jan. 8, 1957
2,963,234
Chase et a1 _____________ __ Dec. 6, 1960
Документ
Категория
Без категории
Просмотров
0
Размер файла
328 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа