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Pack sealing or closing equipment is usually part of or situated
immediately adjacent to the pack filling machine, for use before and after
the filling operation. A number of different methods are available to close
the pack, although each different type of pack has a limited number of
options that are applicable.
Cold or hot melt adhesive applicator applies a shot or spray of adhesive on
to the inside surface of the flaps of a carton or case prior to folding of
Electrical cartridge elements provide heat to a contact surface to melt two
polymeric packaging materials together under pressure. This technique is
used in sandwich packs, ready meals and in modified atmosphere packaging.
Opposite surface of pack needs supporting to oppose the applied pressure.
Staples are used to hold the flaps of a multi-ply cardboard case together.
The operation of pack stapling equipment works on the same principle of a
desktop paper stapler, where the staple is displaced from a magazine and an
anvil forms the opposite side of the staple.
Adhesive backed tape is applied to upper and lower closed flaps of a case.
It is operated as the case is passed over the top of a tape head to seal the
lower flaps or underneath of a tape head to seal the upper flaps. The tape
applicator can be built in to a case erecting machine or be a simple hand
held tape gun.
The vertical edges of a rolled can body are formed around each other to
lock together. The upper and lower edges of a can body and the can lid are
formed around each other to provide a tight seal between the body and the
lid. The body and lid seaming operation is carried out before and after the
Capping machines provide a closure and seal for bottles. The commonly used
types of cap are screw, cork, plug and crown. The position of the bottle
needs to be controlled, as it does for filling. A cap is picked up and
located on the top of the bottle. For some applications a number of
different caps are fitted to the bottle during successive capping