That one is a *Manual Impulse Heat Sealer* - also called *Polythene Bag Sealing Machine.*
*Working for / Use:*
It is used to seal / close plastic bags after packing.
1. *For your chips business:* After you put your potato/cassava chips, popcorn, spices, coffee, etc. inside a polythene bag / kaveera, you put the mouth of the bag between the two blue lines and press the handle down.
2. The machine heats and melts the plastic together for 2-3 seconds and makes an airtight seal.
3. Then you release, the seal cools and stays closed.
*Purpose:*
- To keep air out so chips stay crispy and don't spoil
- To keep dust out
- To make it look professional for selling
- No need for rubber bands or candle
You plug it in electricity, it does NOT heat always - it only heats when you press down. That's why it's called *Impulse* sealer.