Abstract:
PROBLEM TO BE SOLVED: To provide an inkjet printer that can make ink landing to an appropriate position of a recording medium by supplementing gap information in a part where the gap information cannot be acquired in a corrugated shape recording medium.SOLUTION: Landing displacements at a plurality of mountain formation positions and valley formation positions on a recording sheet where the mountain parts and the valley parts are alternately lined up in a corrugated shape are acquired by reading printed landing displacement detection patterns (S102). When there are the numbers of mountain forming positions, and the valley forming positions which can not acquire the landing displacements (S103, S104: YES), and when both numbers are less than the prescribed numbers (S105: NO), the landing displacements at these mountain forming positions and the valley forming positions are supplemented by an average value of landing displacements in other mountain forming positions where the landing displacements are acquired, and an average value of landing displacements in other valley forming positions where the landing displacements are acquired, respectively (S107).
Abstract:
PURPOSE:To enable a recording head to be securely set into and released from a recording position, by a construction wherein a fulcrum of a pressing member in setting a recoding head into a recording position and retracting the head from the recording position is provided at a position deviated from a dynamic balance point in relation to each pressure spring. CONSTITUTION:In the case of releasing the recording head 1 from the recording position, where a cam 6 is rotated, a member 3 is gradually depressed downward. Since a cooperating point A is deviated from the dynamic balance point O to the side of the pressure spring 4, the member 3 is first gradually depressed while being titled to the side of the spring 4, and after the tip of the member 3 is fastened to a stopper 7, the member 3 on the side of a pressure spring 5 is depressed downward, and the head 1 is released from the recoding position. When setting the head 1 into the recording position, the cam 6 is ruther rotated, thereby pushing the member 3 upward. The member 3 is first pushed on the side of the spring 4, and after the tip of the head 1 is fastened to a platen 2, the member 3 on the side of the spring 5 is pushed upward, whereby the head 1 is set into the recording position.
Abstract:
PURPOSE:To eliminate slippage by providing a generating means for a timing signal having a delay corresponding to the speed of a hammer bank in a line printer which prints while giving a head an asynchromesh traverse motion. CONSTITUTION:The following means are provided: a means 10-14 to detect an instantaneous location of a head bank in motion at a fixed distance interval and generate a position timing pulse (Gi) when each hammer is located at a prearranged distance from the next printing dot location; a means 16 to generate a lumped voltage (Ki) with a prearranged gradient in response to said pulse (Gi); a means 18 to generate a DC voltage signal (J) having a level which changes in accordance with the pulse period of the pulse (Gi) through the conversion of the pulse (Gi) frequency to a voltage; a means 24 to generate a printing drive timing signal (Mi) having a delay time (Ti) which meets the speed of the hammer bank against each pulse (Gi); and a means 26, 28 to selectively drive each hammer in response to the signal (Mi).