摘要:
A web-fed printing press for newspaper production has a cutter cylinder( F 1 ) for cutting a printed paper web ( W ) into sections ( FS ) while the web is riding on a folding cylinder ( F 2 ). Each web section is subsequently folded into a signature by having its midpart inserted by a folding blade ( F 23 ) on the folding cylinder into a jaw cavity (11) in a jaw cylinder ( F 3 ). A series of movable jaw parts (12) are mounted in each jaw cavity for movement toward and away from a series of fixed jaw parts (13) in order to engage and fold the inserted midpart of the web section. In order to firmly engage each web section ( FS ) without causing ink offset between its contacting surfaces, the two outmost movable jaw parts (12 s ) which are to engage the pair of margins ( FSN ) of each web section are less spaced from the fixed jaw parts (13) than are the medial movable jaw parts (12 c ) which are to engage the image area ( FSP ) of each web section.
摘要:
A jaw cylinder in a jaw folder is provided, which can correctly adjust a gap between a stationary member and a swing member in a jaw mechanism in accordance with a thickness of a print to be processed. A first base (1) includes a stationary member (11) in a jaw mechanism. A second base (2) includes a swing member (21) having a jaw portion accessible to the jaw portion of the stationary member (11). A third base (3) has end axes (31a, 31b) at both ends and is rotatably supported by the end axes (31a, 31b) on a pair of opposite frames (Fa, Fb). The first (1) and second (2) bases are rotatably located on the third base (3) about the rotational centerline of the third base (3) relative to the third base (3). The first (1), second (2) and third (3) bases synchronously rotate to move the swing member (21) close to and apart from the stationary member(11)togripaprinttherebetween.Ajawclearanceadjusting mechanism (4) turns the first (1) and second (2) bases about the rotational centerline of the third base (3) in opposite directions to adjust a gap between the jaw portions of the stationary (11) and swing (21) members in the jaw mechanism. A first force exerting mechanism (8) always exerts a force on the first base (1) in the direction parallel with the tangent to a rotational trail of the first base (1). A second force exerting mechanism (9) always exerts a force on the second base (2) in the direction parallel with the tangent to a rotational trail of the second base (2).
摘要:
A jaw cylinder in a jaw folder is provided, which can correctly adjust a gap between a stationary member and a swing member in a jaw mechanism in accordance with a thickness of a print to be processed. A first base (1) includes a stationary member (11) in a jaw mechanism. A second base (2) includes a swing member (21) having a jaw portion accessible to the jaw portion of the stationary member (11). A third base (3) has end axes (31a, 31b) at both ends and is rotatably supported by the end axes (31a, 31b) on a pair of opposite frames (Fa, Fb). The first (1) and second (2) bases are rotatably located on the third base (3) about the rotational centerline of the third base (3) relative to the third base (3). The first (1), second (2) and third (3) bases synchronously rotate to move the swing member (21) close to and apart from the stationary member(11)togripaprinttherebetween.Ajawclearanceadjusting mechanism (4) turns the first (1) and second (2) bases about the rotational centerline of the third base (3) in opposite directions to adjust a gap between the jaw portions of the stationary (11) and swing (21) members in the jaw mechanism. A first force exerting mechanism (8) always exerts a force on the first base (1) in the direction parallel with the tangent to a rotational trail of the first base (1). A second force exerting mechanism (9) always exerts a force on the second base (2) in the direction parallel with the tangent to a rotational trail of the second base (2).
摘要:
A folding apparatus of a rotary press which can select collect run or straight run comprises: a fixed pin cam 2 which performs operations of straight run and collect run; a correction pin cam 3 which stops in case of straight run, and protrudes/retracts a pin end portion with respect to an outer periphery of a folding cylinder once per two rotations of a folding cylinder 12 in case of collect run; a blade cam 4 which thrusts a blade of each blade device 16 into a jaw device 17 once per rotation of the folding cylinder in case of straight run, and thrusts the same into the jaw device 17 once per two rotations of the folding cylinder in case of collect run; switching means 62 for switching between a drive side connection and a stop side connection of the correction pin cam and the blade cam; and detecting means 61 for detecting a start-up timing of the switching means.
摘要:
A web-fed printing press for newspaper production has a cutter cylinder( F 1 ) for cutting a printed paper web ( W ) into sections ( FS ) while the web is riding on a folding cylinder ( F 2 ). Each web section is subsequently folded into a signature by having its midpart inserted by a folding blade ( F 23 ) on the folding cylinder into a jaw cavity (11) in a jaw cylinder ( F 3 ). A series of movable jaw parts (12) are mounted in each jaw cavity for movement toward and away from a series of fixed jaw parts (13) in order to engage and fold the inserted midpart of the web section. In order to firmly engage each web section ( FS ) without causing ink offset between its contacting surfaces, the two outmost movable jaw parts (12 s ) which are to engage the pair of margins ( FSN ) of each web section are less spaced from the fixed jaw parts (13) than are the medial movable jaw parts (12 c ) which are to engage the image area ( FSP ) of each web section.