Thermal printer

A thermal printer comprising:

• a first thermal print head;
• a first platen roller;
• a second thermal print head;
• a second platen roller;
• a printer frame on which the first platen roller and second thermal print head are mounted;
• a first arm on which the first thermal print head is mounted and which can move between a first closed position where the first thermal print head is pressed to the first platen roller, and a first open position where the first thermal print head is separated from the first platen roller;
• and
• a second arm on which the second platen roller is mounted and which can move between a second closed position where the second platen roller is pressed to the second thermal print head and a second open position where the second platen roller is separated from the second thermal print head;
• and wherein
• the second arm moves from the second open position to the second closed position when the first arm moves from the first open position to the first closed position;
• and
• the second arm moves from the second closed position to the second open position when the first arm moves from the first closed position to the first open position;
• wherein
• the second arm reaches the second closed position before the first arm reaches the first closed position when the first arm moves from the first open position to the first closed position.

A thermal printer comprising:

• a first thermal print head;
• a first platen roller;
• a second thermal print head;
• a second platen roller;
• a printer frame on which the first thermal print head and second platen roller are mounted;
• a first arm on which the first platen roller is mounted and which can move between a first closed position where the first platen roller is pressed to the first thermal print head, and a first open position where the first platen roller is separated from the first thermal print head;
• and
• a second arm on which the second thermal print head is mounted and which can move between a second closed position where the second thermal print head is pressed to the second platen roller and a second open position where the second thermal print head is separated from the second platen roller;
• and wherein
• the second arm moves from the second open position to the second closed position when the first arm moves from the first open position to the first closed position;
• and
• the second arm moves from the second closed position to the second open position when the first arm moves from the first closed position to the first open position;
• wherein
• the first arm pivots on a first pivot shaft attached to the printer frame;
• and
• the second arm pivots on a second pivot shaft that is attached parallel to the first pivot shaft on the printer frame at a position that is different from the first pivot shaft.

A thermal printer comprising:

• a first thermal print head;
• a first platen roller;
• a second thermal print head;
• a second platen roller;
• a printer frame on which the first thermal print head and second platen roller are mounted;
• a first arm on which the first platen roller is mounted and which can move between a first closed position where the first platen roller is pressed to the first thermal print head, and a first open position where the first platen roller is separated from the first thermal print head;
• and
• a second arm on which the second thermal print head is mounted and which can move between a second closed position where the second thermal print head is pressed to the second platen roller and a second open position where the second thermal print head is separated from the second platen roller;
• and wherein
• the second arm moves from the second open position to the second closed position when the first arm moves from the first open position to the first closed position;
• and
• the second arm moves from the second closed position to the second open position when the first arm moves from the first closed position to the first open position;
• wherein
• the first arm pivots on a first pivot shaft attached to the printer frame;
• and
• the second arm pivots on a second pivot shaft attached to the first arm parallel to the first pivot shaft.

A thermal printer comprising:

• a first thermal print head;
• a first platen roller;
• a second thermal print head;
• a second platen roller;
• a printer frame on which the first platen roller and second thermal print head are mounted;
• a first arm on which the first thermal print head is mounted and which can move between a first closed position where the first thermal print head is pressed to the first platen roller, and a first open position where the first thermal print head is separated from the first platen roller;
• and
• a second arm on which the second platen roller is mounted and which can move between a second closed position where the second platen roller is pressed to the second thermal print head and a second open position where the second platen roller is separated from the second thermal print head;
• and wherein
• the second arm moves from the second open position to the second closed position when the first arm moves from the first open position to the first closed position;
• and
• the second arm moves from the second closed position to the second open position when the first arm moves from the first closed position to the first open position;
• wherein
• the first arm pivots on a first pivot shaft attached to the printer frame;
• and
• the second arm pivots on a second pivot shaft that is attached parallel to the first pivot shaft on the printer frame at a position that is different from the first pivot shaft.

A thermal printer comprising:

• a first thermal print head;
• a first platen roller;
• a second thermal print head;
• a second platen roller;
• a printer frame on which the first thermal print head and second platen roller are mounted;
• a first arm on which the first platen roller is mounted and which can move between a first closed position where the first platen roller is pressed to the first thermal print head, and a first open position where the first platen roller is separated from the first thermal print head;
• and
• a second arm on which the second thermal print head is mounted and which can move between a second closed position where the second thermal print head is pressed to the second platen roller and a second open position where the second thermal print head is separated from the second platen roller;
• and wherein
• the second arm can be set to a position not reaching the second closed position regardless of the position of the first arm.

A thermal printer comprising:

• a first thermal print head;
• a first platen roller;
• a second thermal print head;
• a second platen roller;
• a printer frame on which the first platen roller and second thermal print head are mounted;
• a first arm on which the first thermal print head is mounted and which can move between a first closed position where the first thermal print head is pressed to the first platen roller, and a first open position where the first thermal print head is separated from the first platen roller;
• and
• a second arm on which the second platen roller is mounted and which can move between a second closed position where the second platen roller is pressed to the second thermal print head and a second open position where the second platen roller is separated from the second thermal print head;
• and wherein
• the second arm can be set to a position not reaching the second closed position regardless of the position of the first arm.