Capless Induction Sealing
New sealing technology providing performance
improvements, significant cost &weight reduction
opportunities and greater design flexibility
Benefits of Capless Induction Sealing
Provides greater control over
sealing process
Allows immediate inspection
of sealed container
Rubber insert in sealing head
delivers better compliance with
uneven sealing surfaces than is
possible with a cap
Allows cooling of seal under
pressure – better performance
with hot-fill products
Reduces cap and liner cost
Use of new sealing technology provides opportunity for efficiency gains,
cleaner production, improved visual appearance of product and enhanced
consumer experience with easy to remove foil.
Conventional Conduction Sealing
Hot, stainless
steel sealing head
Heat pattern on
sealing head face
Pressure & heat
Heat conducted
into foil cap
Product
210°C
Conventional Induction Sealing




Foil lined cap
Cap torque presses foil against neck of bottle
Foil heated through cap using electromagnetic waves
Heat-seal layer melts and bonds foil to bottle
Capless Induction Sealing
Ambient temperature
sealing head
Heat insulation
material
Pressure
Heat pattern on
foil seal only sealing area
of foil is heated
230°C
Heat induced into foil
where required to
form the seal
21°C
Product
Comparison Between Sealing Systems
Conventional Induction
Capless Induction
Components expensive due to requirements of
 Can use low cost reel-fed material and light-
cap lining process & foil retention in cap
weight cap
Completely reliant on cap torque for sealing
Sealing pressure mechanically applied so is
pressure (no control)
reliable and measureable
Quality assurance difficult to verify as cap
Foil can be subject to inspection processes after
covers foil
application
Restrictions on pack design due to
With primary seal being formed by foil,
cap/foil/thread fit
significant flexibility over design of neck finish
and closure is provided
Comparison Between Sealing Systems
Conventional Conduction
Capless Induction
Inefficient, most of the energy put into the
Highly efficient, only the foil seal is heated
head is lost into the atmosphere
during the sealing process
Poor reliability with regular element &
Extremely reliable since system is solid state
thermocouple failures due to high temperature
and sealing head remains at ambient
levels within head whilst operating
temperature with no thermal stress
Difficult to control with temperature time-lag
Precise digital control over energy input to head
Workplace safety issues with hot surfaces
Extremely safe as no hot surfaces present
No conformity with hard & irregular surfaces (ie
Use of silicone rubber and other face materials
PET/Glass )
to provide exact conformity with sealing surface
Lost production with warm-up & cool down
Instant start-up and shut down for optimum
availability
The Benefits of Capless Induction Sealing
Increased Efficiency
Electromagnetic heating within foil, no heat lost into environment
Energy only used when machine sealing, zero consumption on standby
Total Control
Real time digital control over induction power level (temperature)
Exact control of induction cycle time
Precise control of pressure with rubber head insert for even conformity
Ability to maintain pressure on foil during ‘cooling’ phase
Measurement of induction power on each seal possible =100% QA validation
Improved Productivity
Significant reliability improvements as no heat is present in the components
Instant start-up & shut-down
Fast sealing cycle times
Clean sealing
Greater operator safety with cold sealing head
Examples of Capless Induction
Sealing
Metal
High Accuracy
Plastic
Non-Round
Glass
Print Register