What is a pen ink bag and what is it used for?

An ink bag is a tube filled with ink. You can use it by directly inserting the lid into a pen. It is disposable and usually contains a bead to prevent ink from overflowing.

Function: mainly used to replace the pen and ink core of supporting steel.

The steel pen and ink bag is the space for storing ink behind the nib and tongue. There are two kinds of ink bags: one is transparent plastic bag, which is relatively soft. By squeezing out the air inside, and then sucking in the ink when the rubber slowly returns to its original state.

The other is a hard transparent plastic pipe with a piston-like rod and a rubber ring as a sealing ring. The piston pushes the pen tip to exhaust the air in the tube, and the piston pulls the tube end to absorb ink.

Extended data:

How to ink a pen;

1. Ink is coated on the piston, and a hollow sleeve is connected behind the holding position. There is a knob connected with the pen tail in the sleeve, which can be controlled by the knob to move back and forth in the sleeve. When the piston retreats, it facilitates the negative pressure in the sleeve, and the ink can be sucked through the pen tip and stored in the sleeve.

2. Apply ink to the pressure bag and connect an ink bag made of rubber or silica gel behind the holding position. The interior of the ink bag is a space for storing ink. Usually there is a U-shaped reed outside the ink bag to protect the ink bag. When applying ink, the reed squeezes the ink bag to exhaust air, and after the pressure is released, the ink bag returns to its original state to absorb ink.

3. The ink absorber can be regarded as the combination of the ink tube of the ink cartridge and the ink feeding piston or ink feeding pressure bag. The ink cartridge combined with the holding position is at the front, and the pressure bag or only the piston ink feeding mechanism is at the back. When the ink absorber is not used, the ink tube of the ink cartridge with the same specification can be removed and replaced.

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