There isn't one specific machine called a "seed harvester." The type of machine used to harvest seeds depends on the type of crop and how the seeds are collected. Here are some examples:
* Combine Harvester: This is the most common machine for harvesting grains like wheat, barley, and oats. It cuts the stalks, threshes the seeds from the heads, and separates the grain from chaff and other debris.
* Cotton Picker: This machine is used to harvest cotton bolls. It picks the cotton bolls and removes the seeds.
* Seed Stripper: This machine is used to harvest seeds from pods like soybeans, peas, and lentils. It separates the seeds from the pods.
* Seed Cleaning Equipment: This is not a specific machine, but rather a set of equipment used to clean and separate the seeds from chaff, debris, and other unwanted materials. This can include machines like aspirators, sieves, and gravity tables.
So, the "seed harvester" name would depend on the specific crop and the type of seed extraction process.