Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
77 words
Apparatus for scanning documents, comprising an image sensor, a document drive roller, and a one-piece housing rotatably holding said document driver roller and movably holding said image sensor with respect to said document drive roller, the housing constraining the image sensor to move substantially perpendicularly to a plane tangential to the surface of the document drive roller at a position where the image sensor contacts the document drive roller when no document is inserted between the two.
Claim 2
Dependent Claim
77 words
Apparatus for scanning documents, comprising an image sensor, a document drive roller, and a one-piece housing rotatably holding said document driver roller and movably holding said image sensor with respect to said document drive roller, the housing constraining the image sensor to move substantially perpendicularly to a plane tangential to the surface of the document drive roller at a position where the image sensor contacts the document drive roller when no document is inserted between the two.
Claim 3
Dependent Claim
29 words
Apparatus according to claim 1 further comprising a plurality of document sensors, said housing holding said document sensors in close alignment with said drive roller and said image sensor.
Claim 4
Dependent Claim
35 words
Apparatus according to claim 2, wherein the number and spacing of said document sensors is such that the narrowest common document, a business card turned in its narrow dimension, encounters at least one such sensor.
Claim 5
Dependent Claim
30 words
Apparatus according to claim 2 wherein said document sensors include a set of document-skew-detecting sensors and a set of document-insertion-detecting sensors, the sets of sensors acting independently of each other.
Claim 6
Dependent Claim
40 words
Apparatus according to claim 4 wherein the number and spacing of the sensors in said set of document-insertion-sensing sensors is such that the narrowest common document, a business card turned in its narrow dimension, encounters at least one such sensor.
Claim 7
Dependent Claim
48 words
Apparatus according to claim 4 further comprising a cover closely fit around said housing and positioned in close alignment with respect to said housing, said cover and said housing defining a document entry path closely aligned to said image sensor, said document drive roller, and said document sensors.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 6 wherein said cover and said housing also define one or more document exit paths.
Claim 9
Dependent Claim
35 words
Apparatus according to claim 7 wherein said cover includes a plurality of cover portions, said cover portions interlocking to accurately position said cover portions with respect to each other and with respect to said housing.
Claim 10
Dependent Claim
85 words
Apparatus according to claim 7 wherein said cover has a plurality of sides, including a front side intended for orientation toward a user, said front side containing the entrance to said document entry path, said cover including a movable member adjustable by said user to one of two positions, said movable member cooperating with said cover and said housing to define a first document exit path directing documents generally toward said user and a second document exit path directing documents generally away from said user.
Claim 11
Dependent Claim
15 words
Apparatus according to claim 6 wherein said document sensors include a set of document-insertion-detecting sensors.
Claim 12
Dependent Claim
18 words
Apparatus according to claim 10 wherein said document-insertion-detecting sensors are mechanical sensors located in the document entry path.
Claim 13
Dependent Claim
51 words
Apparatus according to claim 11 wherein said document-insertion-detecting sensors comprise a plurality of physically connected flag-shaped members, the plurality of members carried by a support shaft held by said housing and rotating in unison along the axis of said shaft, each member having a first portion extending through said entry path.
Claim 14
Dependent Claim
39 words
Apparatus according to claim 12 further comprising a tail member carried by said support shaft for interrupting the optical path of an optical sensor when the tail member is rotated as a document is inserted into said entry path.
Claim 15
Dependent Claim
35 words
Apparatus according to claim 13 further comprising a chassis held by said housing in close alignment with said document-insertion-detecting sensors, and an optical sensor affixed to said chassis and positioned to sense said tail member.
Claim 16
Dependent Claim
46 words
Apparatus according to claim 12 wherein said document sensors include a set of document-skew-detecting sensors and wherein said document-skew-detecting sensors comprise a plurality of independent flag-shaped members, the plurality of document-skew-detecting sensors carried by said support shaft and rotatable independently with respect to said document-insertion-detecting members.
Claim 17
Dependent Claim
31 words
Apparatus according to claim 15 wherein each of said document-skew-detecting sensor members has a tail portion for interrupting the optical path of an optical sensor when the tail member is rotated.
Claim 18
Dependent Claim
15 words
Apparatus according to claim 12 wherein said document sensors include a set of document-skew-detecting sensors.
Claim 19
Dependent Claim
57 words
Apparatus according to claim 6 wherein said document entry path has an elongated width and said set of document-skew-detecting sensors includes at least two sensors, wherein at least one sensor is located near one edge of the entry path width and at least one other sensor is located near the other edge of the entry path width.
Claim 20
Dependent Claim
60 words
Apparatus according to claim 18, the apparatus further comprising a reversible motor coupled to said drive roller for drawing a document from the user through said input path, and means for reversing the motor to return a document to the user through said input path when a document-skew-detecting sensor detects the presence of a skewed document in said input path.
Claim 21
Dependent Claim
28 words
Apparatus according to claim 1 further comprising a spring held and positioned by said housing so as to urge said image sensor into contact with said drive roller.
Claim 22
Dependent Claim
45 words
Apparatus according to claim 1 further comprising a cover closely fit around said housing and positioned in close alignment with respect to said housing, said cover and said housing defining a document entry path closely aligned to said image sensor and said document drive roller.
Claim 23
Dependent Claim
19 words
Apparatus according to claim 21 wherein said cover and said housing also define one or more document exit paths.
Claim 24
Dependent Claim
33 words
Apparatus according to claim 22 wherein said cover includes a plurality of portions, said cover portions interlocking to accurately position said portions with respect to each other and with respect to said housing.
Claim 25
Dependent Claim
85 words
Apparatus according to claim 22 wherein said cover has a plurality of sides, including a front side intended for orientation toward a user, said front side containing the entrance to said document entry path, said cover including a movable member adjustable by said user to one of two positions, said movable member cooperating with said cover and said housing to define a first document exit path directing documents generally toward said user and a second document exit path directing documents generally away from said user.
Claim 26
Dependent Claim
24 words
Apparatus according to claim 9 or claim 24 wherein said movable member is removable to allow access by the user to the document path.
Claim 27
Dependent Claim
30 words
Apparatus according to claim 1 wherein said housing is formed from a material having a coefficient of friction sufficiently low as to provide a self-bearing surface with said drive roller.
Claim 28
Dependent Claim
45 words
Apparatus according to claim 1 further comprising spring means held and positioned by said housing so as to urge said image sensor into contact with said drive roller along a contact line with a substantially uniform force along the working length of the image sensor.