Pack201 | Functional Descriptions | Section 5
© Bosch Packaging Technology Inc.
All rights reserved 2012
EN | 2
5 Functional Descriptions
5.1 Sequence of Operation
Product is placed, either manually or from
an automated feeding system, between the
pushers (flights) on the wrapper infeed
conveyor� The infeed pusher pushes the
product into the wrapper, deposits the
product on the sealing material, and drops
away�
Sealing material is drawn from a large
roll on the backstand by the finwheels�
The sealing material carries the product
into the former and is formed into a tube
around the product�
As the former makes the tube around
the product, the two ends of material
pass between sets of rotating, serrated
finwheels� Only the second set of
finwheels is normally heated� The first set
of finwheels serrates and compresses the
sealing area� The second set of finwheels
heats the material, and the third set of
finwheels presses them together into a
finseal�
The tube of material with the enclosed
product then moves through a fold-
over plate or an optional set of auxiliary
finwheels which folds the finseal against
the bottom of the tube� The tube then
enters the endseal area�
In the endseal area, a pair of rotating
shafts, each equipped with heated,
serrated crimpers, seal the tube of
material closed between each product�
The upper crimper holds a cutoff knife,
and the lower crimper holds a backup
plate called an anvil� When the crimpers
mate together for sealing, the knife and
anvil cut through the center of the seal,
across the width of the material� This
leaves a seal on the trailing end of the
package being discharged and on the
leading edge of the next package on the
tube�
The individually sealed packages are
discharged from the wrapper by the
discharge conveyor belt�
