Product Name
Piston Insertion Thread, String, Filament
Brief Description
A specialized tool, typically a thin filament or string, designed to facilitate the insertion of small pistons into non-vented cartridges and syringes. Its primary function is to create a temporary channel for trapped air to escape during the piston insertion process, thereby preventing air pockets and ensuring proper, consistent piston seating.
Popular Applications & Uses
- Inserting pistons into small, non-vented cartridges, such as 4:1 and 10:1 50ml cartridges.- Inserting pistons into small, non-vented syringes, including K-System small syringe pistons.- Preventing air entrapment between the piston and the fluid column during assembly in dispensing systems.- Ensuring consistent and accurate piston insertion depth and alignment.- Used in the assembly of various pre-filled syringes and cartridges for precise fluid dispensing.
Industries that Commonly Use It
- Medical Device/ Prosthetics- Packaging Services or Contractor (specifically for medical and pharmaceutical packaging and assembly)
Special and Unique Features
- Specifically engineered for use with non-vented pistons, where traditional vented piston technologies are not applicable due to size or design.- Acts as an essential air venting strip or filament, allowing trapped air to escape during piston insertion.- Helps to eliminate issues like piston bounce and inconsistent deposits caused by trapped air.- Enables a more reliable and consistent manual or semi-automated piston insertion process.
Key Properties
- Flexible and thin material (thread, string, or filament) to fit precisely between the piston and the inner wall of the cartridge or syringe.- Designed to be non-damaging to the delicate piston wipers and the internal surfaces of the syringe or cartridge barrel.- Typically made from materials that do not contaminate the contents of the cartridge or syringe.
Surface Compatibility
- Compatible with the internal surfaces of various small cartridges and syringes, including those made from plastics and glass.- Designed to interact safely with piston materials without causing abrasion or damage to the sealing wipers.
Known backups / known substitutes
- Automated piston inserters equipped with integrated air-bleed systems for high-volume production.- Manual piston insertion techniques without a venting aid, though these are often less consistent and prone to trapping air.- Specialized barrier pistons with integrated holes for airflow, primarily for thin fluids and cyanoacrylates.- Using other small, flexible shims, such as a piece of fishing line, to create a temporary vent.
Comparison Note
This Piston Insertion Thread, String, Filament provides a simple, cost-effective, and highly effective solution for air management during piston insertion in small, non-vented cartridges and syringes. It offers a significant advantage over basic manual insertion by reliably preventing air entrapment, which is crucial for product integrity and dispensing accuracy, especially in applications where automated systems are not feasible or economically viable.
