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In addition to the established coating system Bohle Film Coater BFC, the German engineering company L.B. Bohle Maschinen + Verfahren GmbH developed a new coater to face the market needs, the Bohle-Tablet-Coater BTC. The new coater combines all the key features and advantages of the high-end Film Coater BFC in an economical package. The BTC provides unparalleled tablet consistency and efficiencies resulting in a high speed, problem-free coating. Bohle’s patented air flow design within the coating pan reduces the likelihood of spray drying. The inlet and exhaust air flows are guided through the tablet bed producing a constant flow within the bed and minimizing turbulence above the bed. The air flow is cooled while in the tablet bed and not in the spray zone. Spray drying is virtually eliminated resulting in minimal coating solution loss, uniform tablet surfaces and a high quality, defect-free film coat. The BTC incorporates (like the BFC) a smaller diameter, elongated coating pan with unique mixing baffles. This pan design offers an increased tablet spraying surface area allowing for the delivery of more suspension solution (total higher spray rate from increased number of nozzles). The benefits are a reduced overall time for the complete coating process, and a reduction in the static pressure on the underlying tablets within the bed. The integrated mixing baffles, in conjunction with the overall pan design, lead to superior tablet blending with the gentlest handling possible. The baffles are configured in a double helix-shaped arrangement, guaranteeing thorough and efficient tablet mixing (no “dead” zones).
“Twin” formation is avoided via comprehensive mixing, constant air flow through the bed and reduction of static pressure. Furthermore, this special baffle design allows for quick, 100% tablet discharge by simply reversing the rotation of the pan. The BTC spray arm including the spray nozzles is mounted on the front door assembly. Inspection and maintenance of the arm and nozzles are easily accomplished whenever the front door is open. The Bohle-Tablet-Coater BTC incorporates an ergonomic design that allows for efficient material handling and is capable of Wash-In-Place functionality (WIP). Large radius corners and smooth process surfaces facilitate Wash-In-Place (WIP).

The advantages of the Bohle Tablet Coater:

• Fast, problem-free coating
• High uniformity
• Up to a 35% shorter processing time in comparison to conventional coating systems
• Ge