Sealing Jaws & Bars
Bar, jaw and contact geometry, fixing dimensions and film interface, matched to the required seam.
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MACHINE-SPECIFIC SEALING SYSTEMS
Sealing Components & Heating Elements
Sealing jaws, impulse bands, NiCr elements and PTFE-insulated strips engineered as a complete electrical and mechanical interface — from the existing part, drawing or machine reference.
THE COMPLETE INTERFACE
The sealing bar and resistance element work together.
LSC starts with contact geometry, sealing duty and the original machine circuit. The aim is a qualified replacement, not a nominally similar strip.
Impulse Sealing & Cutting Bands
Flat or formed resistive elements for sealing, simultaneous seal-and-cut, trimming and cutting.
Cold Ends & Terminals
Cold-zone lengths, insulation and terminal geometry designed with the active element and machine connection.
PROFILE GEOMETRY
The cross-section follows the sealing function.
These three simplified LSC sketches show functional principles, not manufacturer profiles or dimensional specifications.
01 · Seal
Broad, continuous heat/contact footprint for an impulse seam.
02 · Seal + Cut
A raised or focused profile for simultaneous joining and material separation.
03 · Cut / Trim
Concentrated thermal contact for cutting or edge trimming.
Possible profile families
Flat BandTapered EdgeReflexDouble SeamBeadedT-ProfileCustom Seal/CutTrimCuttingOvalHalf RoundCustom Profiles
The names describe possible geometries; they are not universal catalogue sizes. Width, thickness, section and seam are verified using the actual jaw, drawing or sample.
HEAT & LENGTH
Total length is not the active heated length.
The active resistive span sits between low-resistance end zones. Overall length, cold-zone extent and terminal geometry must be dimensioned independently.
Total lengthOverall assembly and termination envelope.
Active heated spanLength intended to produce the sealing heat.
Cold end zonesLow-resistance transition sections towards the terminals.
Electrical interfaceSection, voltage/current or measured resistance, and terminal detail.
LSC original schematic, not to scale. Final lengths and transition geometry require the original component or a dimensioned drawing.
NiCr RESISTANCE MATERIAL
NiCr 80/20 wire, flat strips and formed profiles.
Define the alloy, diameter or width × thickness, resistance per metre, active length and allowable machine electrical load together. Supply can be stock resistance material or finished machine-specific elements.
Wire / round sectionFlat stripFormed / T-profileCircuit-matched elements
Engineering relationship: R = ρ × L / A at a stated reference temperature. Resistivity varies with alloy grade and temperature. A nominal dimension alone cannot define electrical compatibility.
Existing LSC technical examples: flat strip 3.0 × 0.20 mm; other sections from drawing or sample. Illustrative only.
LSC / ORIGINAL SECTION STUDYNiCr 80/20
Wire / round section
Flat strip
Formed / T-profile
PROTECTED RESISTANCE ASSEMBLIES
PTFE-insulated flat resistance strips.
A flat resistive element may be fitted with PTFE sleeve/tube insulation, controlled active and overall lengths, coppered low-resistance ends, and eyelet, crimped, soldered or special terminals.
PTFE sleeve / tubeActive + overall lengthCoppered cold zonesEyelet / crimp / solderDrawing / sample / machine
PTFE insulation and end treatments are application choices, not assumptions for every resistance element.
A 6.0 × 0.30 mm flat strip appears in existing LSC reference material; the final section must be machine-checked.
CONNECTIONS & FINISHES
Finished ends are part of the design.
Original LSC line symbols illustrate common connection families. Hole centres, thickness, fixing and electrical contact must match the existing circuit and mounting.
Eyelet / punched hole
Hole centre, outside width and connection method.
Flat contact tab
Thickness, width and conductive mating area.
Crimped / clamped
Mechanical retention and electrical contact under load.
Formed / custom terminal
Bent, welded or soldered geometry from a sample.
SURFACE / END TREATMENTS
Specify finishes only where the duty requires them.
Coppered low-resistance ends and further coatings are options to assess for each connection — not universal part specifications.
Coppered cold ends
Defined low-resistance termination zones and transition lengths.
Copperplating + nickel coating
Possible additional corrosion/storage protection when contact suitability is confirmed.
Copperplating + plated gold
Possible contact finish for selected precision/control applications, subject to qualification.
Send the existing component. We qualify the replacement.
Machine/model, drawing or sample, total and active lengths, width/thickness/section, terminals, circuit data if known and quantity.
Existing technical URLs remain available for continuity: