A straight-line cup sealing machine is an automated packaging device designed for efficiently sealing various types of cups (such as plastic, paper, or foam cups) with a film lid. The machine operates on a linear conveyor system, where cups are transported in a straight line through filling, sealing, and optional coding or cooling stations. It ensures high-speed, consistent, and airtight seals, commonly used in beverage shops, dairy products, desserts, and food-to-go services. Key features often include adjustable sealing parameters, temperature control, and user-friendly interfaces for versatile applications.