This machine is commonly used in the pharmaceutical industry for inserting cotton into pill containers. The two types of cottoners that exist are inline and rotary. The former features a conveyer system and the latter has a rotary disc with several inserting heads.

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Why use cotton in pill containers? Good question. Unlike pill bottles picked up at the local pharmacy, bottles coming from elsewhere need protection inside for the pill themselves. Just like anything else that is susceptible to breaking during transport, packaging material is required. This is where cottoners enter the picture. Since there is always space left in the bottle, this space needs to be filled. Preferably with cotton from a cottoner. Not only does this prevent pills from breaking, it also reduces any removal of important coatings on the medication.