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US 5,524,991 AGranted
Printing head having a armature backstop
AssigneeCitizen Watch Co., Ltd.
InventorsMakoto Yasunaga, Katsuya Masuda
Life of this patent
Estimating the term…
Abstract
A printing head comprising a plurality of armatures which are arranged radially and which are swingable before and behind, an armature stopper having armature abutting portions of cantilever type provided in projection toward a center in a radial direction at respective locations at the back of the armature for positioning the armatures under a waiting condition, the armature stopper being displaceable by impingement of the armatures, and a gap defined at the back of the armature abutting portions.
Claims7
A printing head, comprising:
- a plurality of armatures, arranged radially and supported to be swingable in a back and forth movement;
- an armature stopper, formed of a material having wear and abrasion resistance, having a central bore and armature abutting portions of cantilever type projecting in a radial direction toward the bore and disposed at a rear of said armatures for positioning the armatures under a waiting condition, said armature abutting portions being displaceable towards a gap defined at a rear of said armature abutting portions by impingement thereon of said armatures;
- an armature stopper table having a bore and an annular projection on a front surface and arranged at a rear of said armature stopper in the form of a planar plate, for defining the gap corresponding to a height of said projection;
- and
- an armature base having a front surface abutting said rear of the armature stopper and a projection provided at a center of said front surface,
- said projection being inserted into the bore of the armature stopper and the bore of the armature stopper table so that said armature stopper and said armature stopper table are mounted on said armature base.
3 more elements
A printing head, comprising:
- a plurality of armatures, arranged radially and supported to be swingable in a respective back and forth movement;
- an armature base disposed at a rear of said armatures;
- an armature stopper, formed of a material having wear and abrasion resistance, having a central bore and armature abutting portions of cantilever type projecting in a radial direction toward the bore and disposed at a rear of said armatures for positioning the armatures under a waiting condition, said armature abutting portions being displaceable towards a gap defined at a rear of said armature abutting portions by impingement thereon of said armatures;
- and
- wherein said armature stopper has the form of a planar plate and has an outer edge, and
- an annular standing wall is formed on said front surface of said armature base, the outer edge of the planar plate being mounted on said front end surface of the wall, for defining the gap corresponding to a height of said standing wall.
3 more elements
Dependencies are inferred from the claim text.