Technical terminology
Understand the terms used to specify a packaging line.
Definitions for 147 filling, dosing, closing, sealing, labelling, inspection, output, safety and validation terms. Use the definitions as a shared project language, then state the measurable requirement.
A
- Accepted output
- Packs that meet the agreed filling, closure, label, code, inspection and secondary-pack criteria within the stated production boundary.
- Accumulation conveyor
- A conveyor or table that stores packs temporarily so a short downstream stop does not immediately stop the upstream process.
- Agitator
- A device that moves product in a vessel to control temperature, suspension or uniformity without assuming that every product benefits from the same shear.
- Air consumption
- Compressed-air demand stated at defined pressure and operating conditions, including peak demand and ancillary equipment.
- Anti-drip nozzle
- A filling nozzle with a shut-off or control feature intended to reduce residual product falling after the dose.
- Application trial
- A controlled test using representative product, packaging and measurable acceptance criteria to confirm an equipment route.
- Aseptic filling
- Filling into a controlled sterile system using a validated process designed to prevent microbial contamination; it is not interchangeable with ordinary clean filling.
- ATEX
- Common shorthand for European explosive-atmosphere product and workplace requirements; projects in Great Britain should check the applicable UK framework and current official guidance.
- Auger filler
- A powder-dosing system that meters product through controlled rotation of a screw within tooling.
- Availability
- The OEE factor comparing run time with planned production time under one documented boundary.
B
- Back pressure
- Force transmitted between contacting packs on a conveyor or accumulation system.
- Balance tank
- A vessel that provides a controlled local product supply to a filler and can stabilise level or pressure.
- Bar-top cork
- A closure with a plug section entering the bottle neck and a top intended for manual or assisted removal.
- Batch code
- A code linking a pack to a defined manufacturing or packing batch for traceability.
- Batch time
- Total scheduled time for a production quantity, including run time, planned losses, changeovers and approvals.
- Bottle pitch
- The centre-to-centre spacing between containers in a controlled machine or conveyor zone.
- Bottom-up filling
- A fill sequence in which the nozzle begins near the container base or liquid surface and rises as the level increases.
- Bulk density
- Mass per unit bulk volume of a powder or granule, including spaces between particles; it can change with handling and settling.
C
- Cap chute
- A track that transfers oriented caps from a feeder to the application point.
- Cap elevator
- A device that raises closures and often supplies them to a sorter or chute.
- Cap sorter
- Equipment that orients closures into a repeatable presentation for application.
- Capping head
- The mechanism that places or tightens a closure, such as a chuck, spindle, press or ROPP head.
- Case taper
- A machine that folds or holds case flaps and applies adhesive tape to close a corrugated case.
- Centreline settings
- Documented repeatable machine positions and recipe values used to return a format to its approved operating condition.
- Change part
- A product- or format-specific mechanical component installed to run a particular container, closure, label or pack.
- Changeover
- The controlled transition from one product, recipe, pack, label or format to another, measured using a defined boundary.
- Check valve
- A valve intended to permit flow in one direction and prevent reverse flow; internal geometry can affect particulate passage.
- Checkweigher
- An in-motion weighing system used to classify or reject packs against defined weight limits.
- Chuck capper
- A capping system in which a head grips or fits over a cap to apply it or control tightening.
- CIP
- Clean-in-place: cleaning product-contact equipment in its installed position using a designed and validated process.
- Closure torque
- Twisting force associated with applying or removing a threaded closure, measured using a defined method and timing.
- Coding
- Applying variable information such as batch, date, time, serial or traceability data to a product or pack.
- Combining table
- A conveyor arrangement that brings multiple pack lanes into fewer lanes or one controlled stream.
- Conformity assessment
- The process used to demonstrate that a product satisfies applicable requirements before it is placed on the relevant market.
- Consumables
- Production materials repeatedly used by a process, including containers, closures, labels, films, inks, ribbons and cleaning items.
- Continuous-motion machine
- Equipment that processes packs while they continue moving rather than stopping for each cycle.
- COP
- Clean-out-of-place: removing components and cleaning them in a separate controlled location or system.
- Counter-pressure filling
- Filling under controlled pressure, commonly used to reduce loss of carbonation from beverages.
- Critical spare
- A replacement component whose unavailability would create unacceptable production, safety or quality risk.
- Cycle time
- Time required to complete one repeated machine cycle, including product and pack handling within the stated boundary.
D
- Date coding
- Printing or marking date information such as use-by, best-before or production date according to the approved message.
- Dead leg
- A section of product path with limited circulation or drainability that can retain product or cleaning solution.
- Deaeration
- Removal or reduction of entrained or dissolved air from a product using an appropriate process.
- Density
- Mass per unit volume, normally measured at a stated temperature and condition.
- Depalletiser
- Equipment that removes containers, trays or layers from a pallet and feeds them into production.
- Desiccant inserter
- A machine that places a moisture-control component into a container before closing.
- Diving nozzle
- A filling nozzle that moves vertically into or out of the pack to control free fall, foam, splashing or product tails.
- Dose range
- The approved minimum and maximum quantity that a filling or dosing system must deliver with stated performance.
- Dosing accuracy
- Closeness of delivered quantity to the intended target under a defined measurement method and sample condition.
- DSEAR
- The Dangerous Substances and Explosive Atmospheres Regulations 2002, which require employers to control specified fire, explosion and corrosion risks.
- Dwell time
- Time during which a process condition such as sealing heat and pressure is applied.
- Dynamic viscosity
- A measure of resistance to flow under defined temperature and shear conditions.
E
- Efficiency allowance
- A planning reduction applied to ideal speed to reflect expected minor stops, replenishment and interaction losses.
- End-of-line equipment
- Machinery after primary pack creation, such as case packing, sealing, wrapping, palletising and inspection.
F
- Factory acceptance test
- A documented test at the supplier or integrator location before dispatch against agreed functions and acceptance criteria.
- Feed screw
- A rotating screw used to space, meter or move containers or product depending on the application.
- Fill head
- One product outlet or dosing station that fills a pack during a machine cycle.
- Fill level
- The observed liquid height in a container, which is not necessarily the same as controlled fill volume or weight.
- Fill volume
- The volume of product delivered to a pack under a defined condition.
- Flowmeter filler
- A system that measures product flow to control the delivered dose.
- Foaming product
- A formulation that readily forms stable or transient bubbles when mixed with air or subjected to turbulence.
- Form-fill-seal
- A process that forms packaging material, fills product and seals the pack within one machine system.
- Freeboard
- Unfilled vessel capacity retained for agitation, foam, expansion, control response or safe operation.
G
- Gravimetric filling
- Dosing controlled by measured mass rather than volume.
- Gravity filler
- A liquid filler using an elevated product head and controlled flow into the container.
- Guard interlock
- A control arrangement that monitors guard position and affects hazardous machine functions according to the safety design.
H
- Hazardous area
- An area in which an explosive atmosphere is present or may be expected in quantities requiring special precautions.
- Headspace
- The space between product and closure or top seal in a filled pack.
- Heat sealer
- Equipment that applies heat, normally with time and pressure, to join compatible packaging layers.
- Holding tank
- A vessel used to store or condition product before it enters the filling process.
- Hopper
- A product vessel shaped to feed powder, granules, pieces or viscous material toward a dosing device.
- Hot fill
- A validated process in which product enters the pack at an elevated temperature for defined product and packaging reasons.
I
- IBC
- Intermediate bulk container used for storage or transport of larger product quantities.
- In-process control
- A check performed during production to confirm the process remains within approved limits.
- Indexing conveyor
- A conveyor that advances packs by controlled steps and stops them for an operation.
- Induction sealer
- Equipment that uses an electromagnetic field to heat a compatible conductive liner under a closure.
- Inline machine
- Equipment arranged along a linear product path, often using conveyors rather than a rotary carousel.
- Inspection system
- Equipment or a documented process used to verify attributes such as presence, position, code, level, weight, seal or damage.
- Integration
- Mechanical, electrical, control, safety and production connection of separate machines into one working system.
L
- Label applicator
- Equipment that dispenses and applies a label to a product or pack.
- Label web
- The continuous backing material carrying pressure-sensitive labels through an applicator.
- Leak test
- A defined test intended to identify loss of pack integrity under specified conditions.
- Line balancing
- Matching the sustainable capacities, controls and buffers of required operations so one process does not repeatedly starve or block another.
- Line clearance
- A controlled check that removes or accounts for previous product, packaging, labels, codes and documents before the next run.
- Line efficiency
- Actual sustainable rate divided by ideal line rate under a defined time and quality boundary.
- Load cell
- A transducer that converts force or weight into a measurable signal.
- Lobe pump
- A positive-displacement pump using rotating lobes, often selected where gentle handling and cleanable construction are required.
- Low-level sensor
- A device that detects when product or material falls below a defined level.
M
- Machine guarding
- Physical and control measures used to prevent or control access to machinery hazards.
- Mass flow
- Container movement arranged so multiple packs travel and accumulate across a wide conveyor surface.
- Metal detector
- Inspection equipment that detects specified metallic contamination under validated product and pack conditions.
- Minimum passage
- The smallest unrestricted internal opening in the product path, important for particles, fibres and viscous product.
- Multihead weigher
- A weighing system that combines portions from multiple weigh hoppers to achieve a target weight.
N
- Net-weight filler
- A filling machine that controls delivered product using measured net mass.
- Nominal quantity
- The quantity declared for the pack, distinct from the individual measured actual contents.
- Nozzle pitch
- The centre-to-centre spacing between multiple filling nozzles.
O
- OEE
- Overall equipment effectiveness: availability multiplied by performance multiplied by quality under one documented boundary.
- Overflow filler
- A level-filling system that returns excess product after the liquid reaches a defined height in the container.
P
- Pack format
- The approved combination of container or flexible material, size, closure, label and associated machine settings or parts.
- Palletiser
- Equipment that arranges cases, trays, bags or products into a controlled pallet load.
- Particulate
- A discrete solid piece or inclusion suspended in, mixed with or separated from another product phase.
- Performance
- The OEE factor comparing actual run output with output expected at the approved ideal cycle.
- Peristaltic filler
- A dosing system in which rollers compress flexible tubing to move product while the product remains inside the tube.
- Pick-and-place
- Automated movement that picks an item from one position and places it at another controlled position.
- Piston filler
- A positive-displacement filler that meters product using a piston and cylinder volume.
- PLC
- Programmable logic controller used to execute machine control logic.
- Positive-displacement pump
- A pump that moves a defined quantity through repeated enclosed displacement.
- Preformed pouch
- A flexible pack manufactured before it reaches the filling machine, where it is presented, opened, filled and sealed or closed.
- Product recovery
- Controlled removal or return of saleable or reusable residual product from equipment before cleaning or changeover.
- Product-contact part
- A machine component whose surface contacts the product under intended or foreseeable conditions.
- Progressive-cavity pump
- A positive-displacement pump using a rotor and stator to move product through cavities.
- PUWER
- The Provision and Use of Work Equipment Regulations 1998, covering suitability and safe use of work equipment in the workplace.
Q
- Quality
- The OEE factor comparing accepted output with total output within the stated boundary.
R
- Recipe
- A stored set of machine parameters associated with an approved product or format.
- Reject confirmation
- A check that verifies a designated nonconforming pack was removed from the production flow.
- Reject rate
- Rejected packs divided by total produced packs within a defined boundary.
- ROPP cap
- A roll-on pilfer-proof metal closure formed onto a compatible threaded bottle finish.
- Rotary filler
- A machine that carries packs around a carousel while performing filling operations.
S
- Sachet
- A small flexible sealed pack normally formed from film or foil laminate.
- Safe isolation
- A controlled method of disconnecting and securing energy sources so work can be carried out without unexpected energisation or stored-energy release.
- Seal integrity
- The ability of a closure or seal to maintain its required barrier and mechanical function under defined conditions.
- Servo drive
- A controlled motor-and-feedback system used for precise motion or dosing.
- Shelf-life trial
- A study of product and pack performance over the intended storage period and conditions.
- Siphoning
- Unintended continued liquid flow caused by a pressure difference and a continuous liquid path.
- Sleeve labelling
- Application of a tubular sleeve label that is normally shrunk or otherwise fitted around a pack.
- Spindle capper
- An inline capper using rotating wheels or belts to tighten a closure while the pack moves through the machine.
- Splash zone
- A surface area exposed to product splash even if it is not normally in direct product contact.
- Stand-up pouch
- A flexible pouch designed with a base or gusset that allows it to stand when filled.
- Star wheel
- A format-specific rotating component that controls container pitch and transfer in rotary or indexed equipment.
- Stick pack
- A narrow elongated flexible pack normally formed, filled and sealed from rollstock.
- Suck-back
- A controlled reverse movement or pressure reduction used to retract product from a filling nozzle at cut-off.
- Sustained output
- Accepted production rate maintained for an agreed period with the defined normal activities and quality boundary.
T
- Tamper evidence
- A pack feature intended to provide visible evidence of opening or interference.
- Tare
- The mass of packaging or a container deducted from gross mass to calculate net contents.
- Throughput
- Quantity processed per unit time under a stated measurement boundary.
- Tolerable negative error
- The defined shortfall used within the packaged-goods average system for applicable nominal quantities.
- Torque head
- A capping mechanism designed to apply controlled rotational force to a closure.
- Traceability
- The ability to link materials, production conditions, equipment or packs to relevant records.
U
- User requirement specification
- An approved document stating what the user needs the equipment and project to achieve, including testable requirements.
V
- Vacuum capper
- Equipment that creates or controls vacuum in the pack headspace while applying a compatible closure.
- Validation
- Documented evidence that a process, method or system consistently fulfils its intended requirement under defined conditions.
- Verification
- Confirmation, through objective evidence, that specified requirements have been fulfilled.
- VFFS
- Vertical form-fill-seal: packaging equipment that forms a vertical pack from rollstock, fills it and seals it.
- Viscosity
- Resistance of a fluid or semi-fluid to flow, dependent on temperature and often shear conditions.
- Volumetric cup filler
- A dosing system that captures and releases a controlled cup volume of free-flowing product.
- Volumetric filling
- Dosing based on controlled volume or displacement.
W
- Wrap-around labeller
- A labelling system that rotates a cylindrical pack while applying a label around part or most of its circumference.