A printer comprises a stationary chassis and a movable chassis mounted on the stationary chassis. A platen is mounted on the movable chassis at the front portion thereof. On the other hand, a printer head is mounted on the stationary chassis at the front portion thereof. The printer head opposes the platen when the movable chassis is placed in operating position. The printer head is associatred with an actuator which moves the printer head toward and away from the platen. The actuator normally holds the printer head away from the platen and is responsivel to rotation of the platen to bias the printer head to resiliently contact the platen.