Patent ID: 11883569
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B

Claim 19:
20. A method of manufacturing a biological component collection cassette having a flow path through which a liquid containing at least one biological component flows, the method comprising:
forming a first part on an outer surface of first and second resin sheets, the first part having a plurality of concavities and convexities;
forming a second part on the outer surface of the first and second resin sheets by applying heat to a predetermined position of the first and second resin sheets to make the second part smooth; and
sealing the first and second resin sheets along a sealed section to form a flow path wall of the flow path, the flow path wall comprising the first part and the second part, wherein sealing the first and second resin sheets makes the plurality of concavities and convexities smooth along a border of the flow path that corresponds to the sealed section between the first resin sheet and the second resin sheet.