PATENT CLAIM ANALYSIS

Application Number: 15878458
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["399", "314000"]

Abstract:
In order to prevent interference between a primary transfer bias voltage and a secondary transfer bias voltage, and to prevent occurrence of an image defect due to interference between these bias voltages, an image forming apparatus includes a plurality of primary transfer rollers, an intermediate transfer belt, a drive roller, a secondary transfer roller, and a rectifier roller. A primary transfer bias voltage of a polarity opposite to the polarity of toner is applied to a primary transfer bias applying unit. A secondary transfer bias voltage of a same polarity as the polarity of toner is applied to the drive roller. The rectifier roller is disposed between a most-downstream primary transfer roller and the drive roller. A bias voltage of the same polarity as the polarity of the primary transfer bias voltage or the polarity of the secondary transfer bias voltage is applied to the rectifier roller.

Claim (Index 1):
An image forming apparatus, comprising:\n a plurality of photosensitive drums, each of which is configured to form an electrostatic latent image on a surface thereof, and to carry a toner image; an intermediate transfer belt disposed to face the plurality of photosensitive drums, and configured to circulatingly move in a predetermined circulating direction; a plurality of primary transfer rollers, each of which is disposed to face a corresponding one of the plurality of photosensitive drums with respect to the intermediate transfer belt, and is configured to primarily transfer the toner image from the corresponding one of the plurality of photosensitive drums onto the intermediate transfer belt; a support roller for supporting an inner peripheral surface of the intermediate transfer belt on a downstream side than the plurality of primary transfer rollers in the circulating direction; a secondary transfer roller disposed to face the support roller with respect to the intermediate transfer belt, and configured to secondarily transfer the toner image from the intermediate transfer belt onto a sheet; a conductive contact member disposed to come into contact with the inner peripheral surface of the intermediate transfer belt between the support roller, and a most-downstream primary transfer roller located on a most-downstream side among the plurality of primary transfer rollers in the circulating direction; a primary transfer bias applying unit for applying a primary transfer bias voltage of a polarity opposite to a polarity of the toner to the plurality of primary transfer rollers; a secondary transfer bias applying unit for applying a secondary transfer bias voltage of a same polarity as the polarity of the toner to the support roller; and a contact-member bias applying unit for applying a bias voltage of a same polarity as the polarity of the primary transfer bias voltage or the polarity of the secondary transfer bias voltage to the contact member.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 86.0
- Lexical Diversity: 3.29167
- Patent Class: 399.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13472897', '15602942', '14208131', '11962800', '12167602']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8063067279843019
- 35 USC 102 Novelty (BERT): 0.5109830266607486
- Combined Prediction Score: 0.7767743578519466
- Mean Citation Score: 304.708896
- Max Citation Score: 322.67365
- Similarity Product: 262.94080831114053

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

Dataset: test