Laser printhead having a mechanical skew correction mechanism
View Patent ↗An imaging apparatus is provided including a frame having a portion upon which a printhead is adapted to be mounted. The printhead may include a housing including a main body, at least one flexible mounting beam extending from the main body, and at least one structural member coupled to the at least one flexible mounting beam. The printhead may also include a skew correction mechanism mounted to the printhead housing. The skew correction mechanism may include an adjustment member capable of engaging at least one surface on the printhead housing so as to adjust the position of the printhead housing relative to the frame portion.
1. An imaging apparatus comprising a frame having a portion upon which a printhead is adapted to be mounted, said printhead comprising:
a housing including a main body, at least one flexible mounting beam extending from said main body, and at least one structural member coupled to said at least one flexible mounting beam; and
a skew correction mechanism mounted solely to said printhead housing, said skew correction mechanism including an adjustment member capable of engaging at least one surface on said printhead housing main body so as to adjust the position of said printhead housing main body relative to said frame portion.
2. An imaging apparatus as set forth in claim 1 , wherein said at least one surface on said printhead housing main body comprises first and second surfaces on said printhead housing main body such that said adjustment member is capable of engaging said first and second surfaces on said printhead housing main body.
3. An imaging apparatus as set forth in claim 2 , wherein said at least one flexible mounting beam comprises at least first and second flexible mounting beams extending from said main body and wherein said at least one structural member comprises a first substantially rigid structural member coupled to said first and second flexible mounting beams.
4. An imaging apparatus as set forth in claim 3 , wherein said at least one flexible mounting beam further comprises third and fourth flexible mounting beams extending from said main body and wherein said at least one structural member further comprises a second substantially rigid structural member coupled to said third and fourth flexible mounting beams.
5. An imaging apparatus as set forth in claim 4 , wherein each of said first and second substantially rigid structural members comprises at least one mounting feature for fixing said printhead housing to said frame portion, said mounting feature having an enlarged mounting slot through which a fastener extends such that said fastener may be lightly secured to said frame portion to allow said printhead housing to be subsequently adjusted relative to said frame portion.
6. An imaging apparatus as set forth in claim 4 , wherein said adjustment member of said skew correction mechanism comprises a camshaft and first and second cam lobes coupled to said camshaft, said first cam lobe being adapted to engage said first surface on said printhead housing main body and said second cam lobe being adapted to engage said second surface on said printhead housing main body.
7. An imaging apparatus as set forth in claim 6 , wherein said first and second surfaces on said printhead housing main body are defined by first and second cam follower surfaces on said printhead housing main body.
8. An imaging apparatus as set forth in claim 6 , wherein said first and second cam lobes are axially spaced apart along said camshaft.
9. An imaging apparatus as set forth in claim 8 , wherein each of said first and second cam lobes extends through a maximum angle falling within a range of about 10 degrees to about 180 degrees.
10. An imaging apparatus as set forth in claim 6 , wherein said skew correction mechanism further comprises a detent wheel coupled to said camshaft such that said camshaft rotates with said detent wheel.
11. An imaging apparatus as set forth in claim 10 , wherein said skew correction mechanism further comprises a camshaft support mounted to said first substantially rigid structural member and including a pawl having an engagement member for engaging one of a plurality of recesses provided in said detent wheel.
12. An imaging apparatus as set forth in claim 11 , wherein said skew correction mechanism further comprises a support on said first substantially rigid structural member for receiving an end portion of said camshaft.
13. An imaging apparatus comprising a frame having a portion upon which a printhead is adapted to be mounted, said printhead comprising:
a housing including a main body, at least first and second flexible mounting beams extending from said main body, and at least one structural member comprising a first substantially rigid structural member coupled to said first and second flexible mounting beams; and
a skew correction mechanism associated with said printhead housing, said skew correction mechanism including an adjustment member capable of engaging first and second surfaces on said printhead housing main body so as to adjust the position of said printhead housing main body relative to said frame portion, said adjustment member comprising a camshaft and first and second cam lobes coupled to said camshaft, said first cam lobe being adapted to engage said first surface on said printhead housing main body and said second cam lobe being adapted to engage said second surface on said printhead housing main body.
14. An imaging apparatus as set forth in claim 13 , wherein said first and second cam lobes are axially spaced apart along said camshaft.
15. An imaging apparatus as set forth in claim 13 , wherein said skew correction mechanism further comprises a detent wheel coupled to said camshaft such that said camshaft rotates with said detent wheel.
16. An imaging apparatus as set forth in claim 15 , wherein said skew correction mechanism further comprises a camshaft support mounted to said first substantially rigid structural member including a pawl having an engagement member for engaging one of a plurality of recesses provided in said detent wheel.
17. An imaging apparatus comprising a frame having a portion upon which a printhead is adapted to be mounted, said printhead comprising:
a housing including a main body, at least one flexible mounting beam extending from said main body, and at least one structural member coupled to said at least one flexible mounting beam; and
a skew correction mechanism associated with said printhead housing, said skew correction mechanism including an adjustment member including first and second camming members capable of engaging first and second cam follower surfaces on said printhead housing main body so as to adjust the position of said printhead housing main body relative to said frame portion.
18. An imaging apparatus as set forth in claim 17 , wherein said adjustment member of said skew correction mechanism comprises a camshaft and first and second cam lobes defined by said first and second camming members, said first and second cam lobes being spaced apart in an axial direction along said camshaft.