PATENT CLAIM ANALYSIS

Application Number: 16278892
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-06
Patent Classification: ["399", "071000"]

Abstract:
An image forming apparatus includes an image bearing member, a transfer roller, a power feeding roller, a power source, and a controller. The controller is configured to execute a cleaning mode of cleaning the power feeding roller by applying a bias from the power source to the power feeding roller to transfer toner adhering on the power feeding roller to the image bearing member in a non-image formation period. The controller executes the cleaning mode in such a manner that, when a rotation time in which the transfer roller rotates one round is t1 and a rotation time in which the power feeding roller rotates one round is t2, the cleaning mode comprises a period equal to or longer than (t1+t2) in which an opposite polarity bias having an opposite polarity to the transfer bias is continuously applied from the power source to the power feeding roller.

Claim (Index 1):
An image forming apparatus comprising:\n an image bearing member configured to bear a toner image; a transfer roller comprising a conductive shaft portion and an elastic layer formed around the conductive shaft portion, the transfer roller forming a transfer portion where the transfer roller is in contact with an outer surface of the image bearing member to transfer the toner image borne on the image bearing member onto a recording medium; a power feeding roller configured to rotate while in contact with the transfer roller to supply a current to the transfer roller to transfer the toner image at the transfer portion; a power source configured to apply a transfer bias to the power feeding roller; and a controller configured to execute a cleaning mode of cleaning the power feeding roller by applying a bias from the power source to the power feeding roller to transfer toner adhering on the power feeding roller to the image bearing member through the transfer roller in a non-image formation period in which a toner image for being transferred onto a recording material is not formed, wherein the controller is configured to execute the cleaning mode in such a manner that, in a case where a rotation time in which the transfer roller rotates one round is t 1  and a rotation time in which the power feeding roller rotates one round is t 2 , the cleaning mode comprises a period equal to or longer than (t 1 +t 2 ) in which an opposite polarity bias having an opposite polarity to the transfer bias is continuously applied from the power source to the power feeding roller.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 99.0
- Lexical Diversity: 2.46875
- Patent Class: 399.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15681749', '12828516', '13593791', '14256178', '11691133']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8035393725720706
- 35 USC 102 Novelty (BERT): 0.5477406081626385
- Combined Prediction Score: 0.7779594961311274
- Mean Citation Score: 315.660448
- Max Citation Score: 424.89655
- Similarity Product: 414.6261751105368

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test