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Understanding a China Bag Making Machine quotation starts with knowing what its technical terms actually mean. Words such as servo, EPC, sealing width, lanes, and rated speed describe different aspects of equipment performance, but they do not automatically tell you whether a machine fits your bags. This glossary explains the vocabulary B2B buyers encounter when discussing plastic bag and pouch equipment with Chovyting Machinery. Use it to read specifications more accurately, ask clearer questions, and separate advertised features from the production conditions that must be verified before purchase.
The terms below are grouped by the decisions buyers need to make: selecting a machine family, defining film and bag specifications, understanding controls, checking output, and agreeing on acceptance conditions.
Equipment names and specification conventions can vary between suppliers. Use the definitions as a discussion guide, then confirm dimensions, functions, options, and test conditions in the quotation and technical agreement.
● Start with the bag structure you need to manufacture.
● Define the material and dimensions before comparing machine speed.
● Confirm whether a feature is standard, optional, or unavailable on the quoted model.
● Ask for sample-based verification where terminology alone cannot establish suitability.
A bag making machine converts suitable film or other specified packaging webs into bags through operations such as feeding, sealing, cutting, folding, and punching. The exact process depends on the equipment. A bag making machine should not automatically be assumed to include film extrusion, printing, product filling, or final shipping-carton packing.
Side sealing describes a bag construction in which the machine forms seals along the sides of the finished bag. Material presentation and processing arrangements vary by model. Confirm the finished-bag drawing rather than assuming that side sealing, center sealing, and bottom sealing are interchangeable names.
Explore Chovyting’s side sealing bag making machines when discussing the relevant bag construction and finishing requirements.
Bottom sealing refers to forming a seal at the bag bottom, commonly when processing tubular or folded film. The bag opening, cutting arrangement, and handle operations depend on the product. Bottom sealing does not by itself mean that the finished bag has a flat base or can stand upright.
A T-shirt bag, also called a vest bag, has an opening and handles that resemble the shape of a sleeveless shirt. Ask whether the quoted equipment includes the required handle punching, bag separation, counting, and collection operations.
A wicket bag has holes that allow bags to be held together on a wicket, typically for subsequent handling or loading. Wicket position, hole spacing, bag orientation, and stacking requirements should be specified. The term does not mean that a product-filling system is included.
A laminated pouch is made from a specified multilayer packaging web. Its sealant layer and overall structure influence processing requirements. Three-side-seal, stand-up, and zipper pouches describe different constructions or features, not a guarantee that every pouch machine can produce all of them.
Review Chovyting’s laminated pouch making machines and request confirmation against your pouch drawing and material structure.
A gusset is a fold that allows a bag or pouch to expand. Side gussets and bottom gussets describe different locations and constructions. A supplier may state gusset dimensions using different conventions, so identify whether a quoted measurement refers to one fold depth, the complete folded section, or another drawing dimension.
A zipper is a reclosable profile incorporated into a bag or pouch. A press-to-close zipper and a slider-operated closure are not identical specifications. Confirm zipper compatibility, attachment method, position, and any additional equipment required.
Draw tape generally refers to a strip incorporated near the bag opening so the user can pull the opening closed. Drawstring is often used more broadly in commercial descriptions. Confirm the actual tape or cord design, its material, and the bag construction rather than relying on the name alone.
For this application, review the draw tape garbage bag making machine and compare the proposed configuration with your finished-bag sample.
PE means polyethylene. HDPE means high-density polyethylene, and LDPE means low-density polyethylene. These names identify polymer families, not complete film specifications. Resin blends, additives, recycled content, film construction, and thickness can affect processing, so “suitable for PE” is not sufficient evidence for every PE film.
PP means polypropylene. OPP refers to oriented polypropylene film, while CPP refers to cast polypropylene film. Their processing and sealing characteristics depend on the actual film grade, treatment, coatings, or laminate structure. Confirm which layer is intended to seal.
Film width is a dimension of the incoming material. Finished bag width is a dimension of the completed bag. They are not always equal because folds, gussets, seals, trimming, and processing orientation can change their relationship. Ask for a drawing connecting the incoming film to the final bag.
Bag length describes the agreed finished-bag dimension. Repeat length commonly describes a recurring feed or printed pattern distance. They may be related, but cutting allowance, seal position, and print layout must be considered. Confirm which dimension the machine specification calls “length.”
A micron, written as µm, is one thousandth of a millimeter. A mil is one thousandth of an inch, not one millimeter. One mil equals 25.4 µm. Always write the unit explicitly when exchanging film specifications.
Single-wall thickness measures one layer of film. Double-wall thickness may refer to two superimposed layers, such as flattened tubular film. Confirm the measurement convention before comparing a supplier’s processing range with your film thickness.
Seal width is the width of the bonded area, not the same thing as bag width. A wider seal is not automatically a stronger seal: material compatibility, temperature, pressure, dwell time, and contamination also affect performance.
Send Chovyting Machinery your bag drawing, film structure, thickness unit, and target output. Ask the team to clarify the terminology and identify the equipment configuration that should be evaluated.
A PLC is an industrial controller that executes the machine’s control logic. It coordinates operations using inputs, programmed instructions, and outputs. The presence of a PLC does not establish which functions are automated or how accurately the machine performs them.
An HMI is the operator interface, often a touchscreen, used to display status and enter permitted settings. A PLC controls the process; an HMI provides a way for people to interact with it. Ask which settings, alarms, languages, and recipe functions are actually included.
A servo motor and its drive form part of a controlled motion system, commonly used for tasks such as film feeding or positioning. “Servo-driven” does not mean every axis is independently controlled. Ask which axes use servos and what adjustment or synchronization each axis supports.
A variable frequency drive, often called an inverter, controls the operating speed of a compatible AC motor by varying its electrical supply. It is not interchangeable with a servo positioning system. A machine can use both technologies for different tasks.
In this context, EPC commonly means edge position control: a web-guiding function that helps keep the film laterally aligned. Confirm the supplier’s exact meaning of the abbreviation. EPC does not replace print registration, because the two functions address different positioning problems.
A photocell is a photoelectric sensor. In print registration, a suitable sensor detects a reference mark so the machine can align a processing operation with the printed repeat. A registration sensor is not necessarily a camera inspection system and does not automatically inspect artwork quality.
The web is the continuous film passing through the machine. Web tension is the pulling force applied to it, while the unwinder releases material from the roll. Poorly controlled tension can contribute to wrinkles, stretching, and positioning variation. Confirm the control arrangement and compatible roll specifications.
Dwell time is the period during which a sealing operation applies the relevant heat and pressure. Temperature alone cannot define a sealing process. When machine speed changes, ask how the available sealing time and cooling conditions are affected.
A recipe is a stored group of machine settings for a product or operating condition, where supported. It does not necessarily restore manual guide positions, tooling, or every mechanical adjustment. Recalling a recipe still requires verification of the first acceptable bags.
Cycles per minute describes repeated machine operations. Pieces per minute describes the number of bags produced. They are equal only when the configuration produces one bag per cycle. Ask whether the supplier’s speed figure refers to cycles, output per lane, or total machine output.
A lane is a parallel production path. Suppliers sometimes use “line” to mean a lane, but “production line” can also mean the complete equipment system. Confirm the intended meaning. Multiple lanes do not automatically support different bag dimensions or independent speeds.
For example, Chovyting lists a multi-line bottom sealing machine. The usable lane arrangement must still be checked against the required bag dimensions and configuration.
Rated speed is a stated operating capability under defined conditions. Accepted output is the quantity of finished bags meeting agreed requirements. Neither should be compared without knowing the material, dimensions, lane count, run duration, and treatment of rejects or stops.
Illustrative example: two bags per cycle at 100 cycles per minute gives a theoretical output of 200 bags per minute. This is not a guaranteed accepted output or a specification for a particular Chovyting machine.
Changeover time is the time needed to move from one product setup to another. For a meaningful comparison, define the measurement boundary, such as the last accepted bag of Product A to the first accepted bag of Product B. Record startup waste separately.
A tolerance is an agreed permitted variation from a specified value. Seal strength concerns the performance of the bonded area under a defined test. State the dimension, test method, sampling approach, and acceptance limit instead of using unsupported descriptions such as “perfect sealing” or “high precision.”
Use this no-script lookup tool when reading a China Bag Making Machine quotation. Open the topic closest to the wording you need to clarify.
Ask whether this means incoming film width, finished bag width, sealing capacity, or the total working width across all lanes. Request a dimensioned bag and film layout.
Ask which axes use servos, which operations run automatically, and which tasks still require manual loading, adjustment, inspection, or collection.
Ask for the bag specification, active lane count, total output, test duration, and accepted quantity. Confirm whether the number is a rated maximum or a demonstrated result.
Provide the actual film structure, thickness, blend information where available, roll dimensions, and sample. Ask for suitability confirmation rather than assuming all PE films behave alike.
Ask which bags and materials will be tested, how long the run lasts, what acceptance criteria apply, who supplies consumables, and what report you will receive.
This tool helps identify clarification questions. It does not certify machine suitability or replace the technical agreement.
A FAT is an agreed acceptance test performed at the manufacturer’s facility before shipment. Define the product, film, tooling, operating conditions, duration, and acceptance criteria in advance. A promotional running video is not automatically equivalent to a documented FAT.
A SAT is an agreed acceptance test at the buyer’s installation site. It may address performance after installation under the agreed local conditions. FAT, SAT, installation, and training are separate activities unless the contract explicitly combines them.
Commissioning is the process of checking and preparing installed equipment for its intended operation. Its scope may include setup, functional checks, adjustments, and trial production. Confirm responsibilities for utilities, materials, personnel, travel, and training separately.
Lead time is the period between agreed milestones. Manufacturing lead time is not necessarily the same as delivered-and-operational time. Specify the starting event, completion milestone, shipping allowance, installation requirements, and any approval dependencies.
Incoterms are internationally recognized rules allocating specified delivery responsibilities, costs, and risks between seller and buyer. They do not replace the full sales contract or automatically define payment, warranty, and machine acceptance conditions.
EXW, FOB, and CIF describe different arrangements. FOB and CIF are intended for sea or inland waterway transport. Always state the named place or port and the agreed Incoterms version, and confirm the appropriate arrangement with your logistics adviser.
Standard equipment is included in the agreed base configuration. Options are additional functions or components that may carry extra cost. Consumables and wear parts need their own supply arrangements. Ask the supplier to separate these categories rather than interpreting a general product description as a complete scope of supply.
It is a broad sourcing phrase for bag-making equipment supplied from China, not a technical machine standard. Buyers still need to identify the bag construction, film specification, process, and configuration. This glossary focuses on plastic bag and pouch equipment relevant to Chovyting Machinery.
A PLC executes the machine’s control logic. An HMI is the interface used to display information and enter permitted settings. Having a touchscreen does not, by itself, establish the machine’s automation scope or production accuracy.
No. Edge position control addresses lateral web alignment. Print registration uses a printed reference to coordinate an operation with the artwork repeat. Both may be needed, depending on the product and machine configuration.
Not necessarily. Folds, gussets, seals, trimming, and processing orientation affect the relationship. Ask for a drawing showing the incoming film and the dimensions of the completed bag.
Multiply mil by 25.4 to obtain microns. For example, 1 mil equals 25.4 µm. Also confirm whether the stated thickness refers to one film wall or multiple layers measured together.
Only if the advertised figure is a per-lane figure and the relevant operating conditions support that calculation. Suppliers may already quote total machine output. Confirm the number of bags per cycle and avoid counting the lanes twice.
The meaning depends on the quoted configuration. Ask for an operation-by-operation explanation covering feeding, sealing, cutting, punching, counting, stacking, and collection. Material loading, inspection, or final packing may remain manual.
A FAT should verify the agreed requirements using defined materials and products. Relevant items may include accepted output, dimensional tolerances, seal performance, registration, counting, and changeovers. The scope and test methods must be agreed before the test.
Share your bag sample, technical requirements, and the terms you need clarified. Ask Chovyting Machinery to review equipment fit, configuration boundaries, and a suitable sample-test plan.
● Structure and Components of a Side Seal Bag Making Machine — Continue learning how machine components relate to the production process.
● Laminated Pouch Making Machine Series — Explore the equipment category associated with laminated packaging applications.
● How to Read a China Bag Making Machine Specification Sheet Without Misinterpreting Capacity
● Film Width vs Finished Bag Width in Plastic Bag Machine Quotations
● What to Include in a Bag Making Machine Factory Acceptance Test
A China Bag Making Machine glossary is most useful when it turns unfamiliar words into questions you can verify. Start with the finished bag, define the film and dimensions, identify the required operations, and compare output under agreed conditions. Terms such as servo, automatic, multi-lane, and FAT describe features or processes, not unconditional performance guarantees. When discussing a project with Chovyting Machinery, provide drawings, samples, and production targets so the terminology can be translated into a clear configuration, test plan, and scope of supply before you commit to a purchase.
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