1. Apparatus for compression molding plastic articles, comprising:
a plurality of molds mounted for travel along a first endless path around a first axis, each of said molds including an upper mold section and a lower mold section, at least one of said mold sections being moveable in a first direction parallel to said first axis over a portion of said first endless path with respect to the other, at least one of said mold sections being movable, in a second direction orthogonal to said first axis over said portion of said first endless path and;
a mold charge delivery system for receiving mold charges from a source of plastic material to deliver individual mold charges to said molds in turn and including at least one delivery mechanism that travels in a second endless path around a second axis parallel to said first axis, said second endless path overlying said portion of said first endless path.
2. The apparatus set forth in claim 1 wherein said first axis is vertically oriented.
3. The apparatus set forth in claim 2 wherein said lower mold sections move vertically downwardly and upwardly to open and close said molds, and radially outwardly and inwardly from said first axis to receive said mold charges over said portion of said first endless path.
4. The apparatus set forth in claim 2 wherein said upper mold sections move in a circular path over said portion of said first endless path.
5. The apparatus set forth in claim 1 wherein at least one of said upper and lower mold sections has a cam follower attached thereto, said cam follower being engageable with a cam surface to direct the movement of at least one of said upper and lower mold sections along at least said portion of said first endless path.
6. The apparatus set forth in claim 5 wherein at least one of said upper and lower mold sections is operably supported on a bearing to facilitate movement radially outwardly from said first axis and radially inwardly toward said first axis.
7. The apparatus set forth in claim 6 wherein said bearing is a linear bearing that extends radially relative to said first axis.
8. The apparatus set forth in claim 1 wherein said first endless path has a generally circular share at a first radius around said first axis, said portion being arranged at a greater distance from said first axis than said first radius, said second endless path overlying at least some of said portion of said first endless path.
9. The apparatus set forth in claim 8 wherein while a traversing said portion, said lower mold sections move axially away from said upper mold sections while moving radially outwardly from said first axis.
10. The apparatus set forth in claim 8 wherein while traversing said portion, said lower mold sections move axially toward said upper mold sections while moving radially inwardly toward said first axis.
11. Apparatus for compression molding plastic articles, comprising:
a plurality of molds mounted for travel around a vertical axis, each of said molds including an upper mold section and a lower mold section, said lower mold sections being moveable about said vertical axis in a first endless path that has at least a portion that is non-circular, said upper mold sections being moveable in a generally circular path, said lower mold sections also being moveable vertically with respect to the upper mold sections to form a mold cavity; and
a mold charge delivery system for receiving mold charges from a source of plastic material to deliver individual mold charges to said cavities in turn and including at least one delivery mechanism that travels in a second endless path around a second axis parallel to said vertical axis, said second endless path overlying at least some of the non-circular portion of said first endless path.
12. The apparatus set forth in claim 11 wherein said first endless path has a generally circular shape at a first radius around said first axis, said non-circular portion being at a different distance from said first axis than said first radius, said second endless path overlying at least a portion of said non-circular portion of said first endless path.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A structure for attaching spring having one end connected to a first attaching object and other end connected to a second attaching object, respectively, and being arranged to these attaching objects in parallel,
wherein one end is attached to the first attaching object via a first attaching portion and other end is attached to the second attaching object via a second attaching portion; and
at least one of the first attaching portion and the second attaching portion is formed so as to be able to change a relative angle between the spring and the attaching faces of the first attaching object or the second attaching object.
2. The structure for attaching spring according to claim 1,
wherein the first attaching portion comprises a shaft member for pivotally fitting the spring to the first attaching object, and an adjusting member, which is disposed at a position displaced into the opposite side of the side directed from the shaft member to the second attaching object, for pressing the first attaching object or the spring.
3. The structure for attaching spring according to claim 1,
wherein the second attaching portion comprises a shaft member for pivotally fitting the spring to the second attaching object, and an adjusting member, which is disposed at a position displaced into the opposite side of the side directed from the shaft member to the first attaching object, for pressing the second attaching object or the spring.
4. The structure for attaching spring according to claim 2,
wherein the adjusting member is a male screw member, and an abutting position with the first attaching object, the second attaching object, or the spring is changed by screwing this male screw member backward and forward with respect to a female screw portion which is disposed penetrating through the first attaching object or the second attaching object.
5. The structure for attaching spring according to claim 1,
wherein the first attaching object is an upper frame element to form an upper portion of a backrest of a chair, and the second attaching object is a lower frame element to form a lower portion of the backrest of the chair.
6. The structure for attaching spring according to claim 1,
wherein the first attaching object is a back frame to form at least one portion of a backrest of a chair, and the second attaching object is a base to support a seat of the chair and the backrest thereof.
7. The structure for attaching spring according to claim 1,
wherein the springs are arranged separated at a rear face of a backrest of a chair, and the spring has the same shape as a back frame, an upper frame element, or a lower frame element.
8. The structure for attaching spring according to claim 3,
wherein the adjusting member is a male screw member, and an abutting position with the first attaching object, the second attaching object, or the spring is changed by screwing this male screw member backward and forward with respect to a female screw portion which is disposed penetrating through the first attaching object or the second attaching object.
9. The structure for attaching spring according to claim 2,
wherein the first attaching object is an upper frame element to form an upper portion of a backrest of a chair, and the second attaching object is a lower frame element to form a lower portion of the backrest of the chair.
10. The structure for attaching spring according to claim 3,
wherein the first attaching object is an upper frame element to form an upper portion of a backrest of a chair, and the second attaching object is a lower frame element to form a lower portion of the backrest of the chair.
11. The structure for attaching spring according to claim 4,
wherein the first attaching object is an upper frame element to form an upper portion of a backrest of a chair, and the second attaching object is a lower frame element to form a lower portion of the backrest of the chair.
12. The structure for attaching spring according to claim 2,
wherein the first attaching object is a back frame to form at least one portion of a backrest of a chair, and the second attaching object is a base to support a seat of the chair and the backrest thereof.
13. The structure for attaching spring according to claim 3,
wherein the first attaching object is a back frame to form at least one portion of a backrest of a chair, and the second attaching object is a base to support a seat of the chair and the backrest thereof.
14. The structure for attaching spring according to claim 4,
wherein the first attaching object is a back frame to form at least one portion of a backrest of a chair, and the second attaching object is a base to support a seat of the chair and the backrest thereof.
15. The structure for attaching spring according to claim 2,
wherein the springs are arranged separated at a rear face of a backrest of a chair, and the spring has the same shape as a back frame, an upper frame element, or a lower frame element.
16. The structure for attaching spring according to claim 3,
wherein the springs are arranged separated at a rear face of a backrest of a chair, and the spring has the same shape as a back frame, an upper frame element, or a lower frame element.
17. The structure for attaching spring according to claim 4,
wherein the springs are arranged separated at a rear face of a backrest of a chair, and the spring has the same shape as a back frame, an upper frame element, or a lower frame element.