Safety device in the sheet feeder

A machine which processes sheet-shaped material, having an apparatus comprised of a weighing device, a regulating and controlling device, a driving mechanism, a conveying system, a stack carrier, and a separating and conveying device;

• wherein said regulating and controlling device is connected to both said weighing device and said driving mechanism, with said driving mechanism further connected to said conveying system, and said conveying system operationally connected to said stack carrier;
• and
• wherein at least one permissible weight is stored in said regulating and controlling device and said regulating and controlling device compares said stored permissible weight to the weight of the stack determined by said weighing device and activates said driving mechanism only if said weight of the stack does not exceed said stored permissible weight, and can either lift said stack carrier from a stack-taking position after said stack carrier has taken a stack of sheet-shaped material or can lower said stack carrier after the singulating and discharging of the sheet-shaped material by said separating and conveying device;
• and
• wherein a second weighing device is associated with said conveying system.

A machine which processes sheet-shaped material, having an apparatus comprised of a weighing device, a regulating and controlling device, a driving mechanism, a conveying system, a stack carrier, and a separating and conveying device;

• wherein said regulating and controlling device is connected to both said weighing device and said driving mechanism, with said driving mechanism further connected to said conveying system, and said conveying system operationally connected to said stack carrier;
• and
• wherein at least one permissible weight is stored in said regulating and controlling device and said regulating and controlling device compares said stored permissible weight to the weight of the stack determined by said weighing device and activates said driving mechanism only if said weight of the stack does not exceed said stored permissible weight, and can either lift said stack carrier from a stack-taking position after said stack carrier has taken a stack of sheet-shaped material or can lower said stack carrier after the singulating and discharging of the sheet-shaped material by said separating and conveying device;
• and
• wherein the top side of said stack carrier is at floor level when said stack carrier is in the position to take another stack.

A machine which processes sheet-shaped material, having an apparatus comprised of a weighing device, a regulating and controlling device, a driving mechanism, a conveying system, a stack carrier adapted to receive a preassembled stack from a stack-taking position, and a separating and conveying device;

• wherein said regulating and controlling device is connected to both said weighing device and said driving mechanism, with said driving mechanism further connected to said conveying system, and said conveying system operationally connected to said stack carrier;
• and
• wherein at least one permissible weight is stored said regulating and controlling device and said regulating and controlling device compares said stored permissible weight to the weight of the stack determined by said weighing device and activates said driving mechanism only if said weight of the stack does not exceed said stored permissible weight, and can either lift said stack carrier from a stack-taking position after said stack carrier has taken a stack of sheet-shaped material or can lower said stack carrier after the singulating and discharging of the sheet-shaped material by said separating and conveying device;
• wherein a first weighing device is associated with said stack carrier;
• and
• wherein two measured value transducers for detecting the weight of said stack are positioned diagonally opposite to one another in said first weighing device.

A machine which processes sheet-shaped material, having an apparatus comprised of a weighing device, a regulating and controlling device, a driving mechanism, a conveying system, a stack carrier adapted to receive a preassembled stack from a stack-taking position, and a separating and conveying device;

• wherein said regulating and controlling device is connected to both said weighing device and said driving mechanism, with said driving mechanism further connected to said conveying system, and said conveying system operationally connected to said stack carrier;
• and
• wherein at least one permissible weight is stored in said regulating and controlling device and said regulating and controlling device compares said stored permissible weight to the weight of the stack determined by said weighing device and activates said driving mechanism only if said weight of the stack does not exceed said stored permissible weight, and can either lift said stack carrier from a stack-taking position after said stack carrier has taken a stack of sheet-shaped material or can lower said stack carrier after the singulating and discharging of the sheet-shaped material by said separating and conveying device;
• wherein a first weighing device is associated with said stack carrier;
• and
• wherein said first weighing device is formed from a stationary lower frame and an upper frame, wherein said upper frame can be shifted in a vertical direction, is associated with the lower frame and is supported at four stops, two of which are constructed as measured value transducers.