1. It detects that the blanks are connected by tablets. This is done to prevent the tablets from being mixed, reducing the possibility of a chemical reaction.
2. During the transport of the medicines, there are chances of breakage of tablets, to avoid that sometimes empty space in medicine strips are filled.
3. According to the rules, contents applied in manufacturing the tablets should be mentioned along with the proportions on the backside of the tablet strip. For packets containing only one pill, this empty space is also kept to increase the print area.