Principle Of Operation - Avery Dennison ALS 380 Operating Manual

2 E
QUIPMENT DESCRIPTION
2.1 O
VERVIEW
A Unwind unit
– The unwinding spindle holds the label roll.
– The spreader mechanism (chucking wedge) se-
cures the label roll.
B Dancer arm of the unwind unit
– spring-loaded and rotatable
C Guiding rod for unwind unit
– Also secures the label roll.
D Drive roller unit of the unwind unit
E Pressure roller of the unwind unit
F Braking brush up
– Allows label ribbon to run smoothly, prevents flutter-
ing.
G Casing
– Houses the control electronics, drive electrical sys-
tem, main switch, and fuses.
H Mounting brackets
– For securing the machine in the system.
I Operator panel
J Braking brush down
K Dispenser head
– With integrated label feed
– Optionally equipped with printer or applicator
L Dispensing edge
– The label separates from the backing material here.
M Rewind unit
– An electrically driven rewinding roller takes up the
empty backing material.
– A spreader mechanism secures the backing materi-
al roll.
N Dancer arm of the rewind unit
– spring-loaded and rotatable
O Deflection rollers of the rewind unit

Principle of operation

2.1.2
In labelling mode, the unwind unit [2A] and the drive
roller unit move the [2D] label ribbon. A loop is formed
in the label ribbon between the pressure roller of the un-
wind unit [2E] and the upper braking brush [2F]. An ad-
ditional drive roller unit in the dispenser head [2K] pulls
the ribbon over the dispensing edge [2L]. The label
separates from the backing material at the dispensing
edge.
The drive roller unit in the dispensing head moves the
respective ribbon for a label and then stops until the
next product takes the label under the dispensing edge.
Label ribbon is continuously unwound at the unwind
unit. The loop acts as a buffer between the continuous-
ly operating unwind unit and the periodically operating
label output. The braking brushes keep the label ribbon
taut.
From the dispensing head, the empty backing material
runs over several deflection rollers [2O] to the mo-
tor-driven spreaderrewinding unit [2M]. The multiple
deflections with the spring-loaded dancer arm [2N] act
as a buffer between the label output and the rewind
unit.
The entire operation of the labeller is electronically con-
trolled and monitored. If a malfunction occurs, the con-
trol system sends a corresponding message to the
operator. If necessary, the labelling operation is auto-
matically halted. An electronic signal is issued at the
same time. The signal can be picked up by an external
control system.
11
ALS
380