Which type of safeguarding device allows the gate to close before the ram goes down and reopens during the upward stroke?

The Type B gate is designed to enhance safety in specific machinery operations by allowing the gate to close before the ram moves downward and ensuring that it reopens during the upward stroke. This function is critical in preventing accidents or injuries that could occur if a worker were to be in the vicinity of the machine during its operation.

By having the gate close before the downward movement, it helps to create a physical barrier, protecting individuals from coming into contact with moving parts. Furthermore, reopening on the upward stroke signifies a pause in the power application, allowing for a safe work environment and reducing the risk of pinching or crushing injuries.

Type A, Type C, and Type D gates may be designed differently, possibly allowing different sequences of operation which may not provide the same level of protection offered by the Type B gate. This distinctive operation assures that human safety is prioritized during the rhythmic cycles of the machine's functioning process.