Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A reproduction apparatus for producing copies of a document selectively at one of a plurality of copy image magnification ratios including a photosensitive surface (12), a magnification selector (103), and an optical arrangement (36, 38, 40) for projecting images onto the photosensitive surface at a selected magnification, the apparatus being characterised by a control (90) with associated memory (100), means for reading a word from memory (99) corresponding to the selected magnification ratio, means (42) manifesting the current magnification ratio position of the optical arrangement, means (102) to compare the selected magnification ratio with the current magnification ratio position manifestation, and means (92) responsive to the comparison to change the optical arrangement to the selected magnification ratio.
Claim 2
Dependent Claim
117 words
A reproduction apparatus for producing copies of a document selectively at one of a plurality of copy image magnification ratios including a photosensitive surface (12), a magnification selector (103), and an optical arrangement (36, 38, 40) for projecting images onto the photosensitive surface at a selected magnification, the apparatus being characterised by a control (90) with associated memory (100), means for reading a word from memory (99) corresponding to the selected magnification ratio, means (42) manifesting the current magnification ratio position of the optical arrangement, means (102) to compare the selected magnification ratio with the current magnification ratio position manifestation, and means (92) responsive to the comparison to change the optical arrangement to the selected magnification ratio.
Claim 3
Dependent Claim
34 words
The apparatus of claim 1 wherein the means (42) manifesting the current magnification ratio position includes a potentiometer, and wherein the apparatus includes means (98) for converting the potentiometer voltage to a digital signal.
Claim 4
Dependent Claim
61 words
The apparatus of claim 1 or claim 2 including a motor (41) mechanically connected to an optical element (36 or 40) of the optical arrangement for changing the magnification ratio, and a forward triac and a reverse triac (94, 96) electrically connected to the motor for activating the motor in either the forward or reverse direction in response to said comparison.
Claim 5
Dependent Claim
26 words
The apparatus of claim 3 including means (90, 92) for selectively pulsing the motor upon detecting that the optical element is near the selected magnification ratio.
Claim 6
Dependent Claim
49 words
The apparatus of claim 4 wherein the means (90, 92) for selectively pulsing the motor includes means for determining that the optical element is a given first distance from a selected location defined by the selected magnification ratio, and means for slowing the motor in response to said determination.
Claim 7
Dependent Claim
84 words
The apparatus of claim 5 wherein the means for slowing the motor comprises means for operating the motor at approximately a 70 percent duty cycle upon determining that the optical element is at said first distance, and for operating the motor at approximately a 50 percent duty cycle upon determining that the optical element is at a second distance from the selected location and repeating the process for progressively closer distances and successively lower duty cycles until the optical element reaches the selected distance.
Claim 8
Dependent Claim
40 words
The apparatus of claim 6 including means for determining that the optical element is at a shut off distance from the selected location, stopping the pulsing of the motor, and allowing the optical element to coast to the selected location.